The following research by J. Kelsey Jones:
There are no memorial markers for several feet on either side of Nathaniel. If wife Jemima Collins had accompanied the family to the Chemung Valley she has no memorial marker. She was deceased by June 1794 when Nathaniel married 2 June 1794 Ann Waeir.

Nathaniel and Jemima resided at Cornwall, Orange County, New York. At a meeting of the freeholders and inhabitants of the precinct of Cornwall, in the county of Orange, on the first Tuesday in April, 1765, at the house of John Brewster in Bloominggrove, Nathaniel Seely was Overseer of the road from James Sear’s to Saterlie’s mill.

The identity of Jemima Collins would indicate she was a daughter of Abraham Collins. He was evidently deceased prior to Jan 1756 and perhaps of Blooming Grove, Orange County, New York. Letters of Administration of Abraham Collins to John Sackett, 6 Jan 1756 (Abstracts of Wills on file in the Surrogate's Office, City of New York. Vol. V, 1754-1760; New York Historical Society, 1896, p. 433).

Jemima’s mother was evidently a daughter of Adam Baldridge. In the name of God, Amen. I, Adam Balderidge, of New Utrecht, in Kings County, on Long Island. I leave to Sarah Coleman, Jemima Sealy, and Elizabeth, formerly the wife of David Cameron, all of them the daughters of Abraham Collins, deceased, of Blooming Grove, New York, all of my estate, real and personal, except as follows. To my friend, Jacob Gale, £100. To my friend, Benjamin Whitehead, of Jamaica, £50. But if none of the above legatees should appear and make lawful claims to my said estate, then I leave all my estate to the Church of New Utrecht, to be put at interest and the interest used for the relief of the Poor of New Utrecht by the Elders of the Church. My executors are to take proper pains to notify the above legatees. I make my friends, Adrian Van Brunt, Peter Van Pelt, John Edmonds, executors, all of New Utrecht. Dated 1 October 1777. Witnesses, Evert Suydam, Teunis Suydam, John Dennis. Proved, May 6, 1780 (Abstracts of Wills on File in the Surrogate's Office, City of New York. Vol. IX, 1777-1783; NewYork Historical Society, 1900, p. 110).

The above Sarah Coleman was the wife of Jeremiah Coleman and they removed from Orange County perhaps prior to the American Revolution to Plymouth in the Wyoming Valley of Pennsylvania and this family is quite well documented. Jemima Sealy is believed to be Jemima Seeley. It is further known that Jemima had a brother Adam Collins and he was not named in the above Will of Adam Baldridge having died prior to that date. His own Will follows:

In the name of God, Amen. I, Adam Collins, of Blooming Grove, in New Cornwall Precinct, Orange County, being weak in body. I leave to my nephew, Jeremiah Colman, all my real and fast estate, when he is of age. "My mother shall be maintained in a comfortable and decent manner during her life, and at the time of her death she be buried at the place of her request in a decent manner." I leave to my brother-in-law, Nathaniel Seely, the use of my real estate until my nephew is of age. I leave to my brother, Jacob Gale, my best wearing suit of apparell. I make Nathaniel Seely and my friend, Nathaniel Satterly, executors. Dated 1 May 1770. Nephew Samuel Seely mentioned in correction in later volume. Proved 15 Aug 1770. (Abstracts of Wills on file in the Surrogate’s Office, City of New York, Volume VII, 1766-1771, York Historical Society, 1898).

These Wills would indicate that Adam Baldridge had a daughter who married Abraham Collins. Abraham Collins was deceased prior to 6 Jan 1756 and his wife was yet living 1 May 1770 but perhaps deceased by 1 Oct 1777 when her father Adam Baldridge named three granddaughters Sarah Coleman, Jemima Seeley, and Elizabeth wife of David Cameron. His grandson Adam Collins had died previously naming in his Will nephew Jeremiah Coleman, nephew Samuel Seeley and brother in law Nathaniel Seeley

Nathaniel and Jemima were residing in Cornwall when in 1775 the Revolutinary Pledge was signed by Samuel Seely, Josiah Seely, Nathaniel Seely, John Seely, Jonas Seely, Israel Seely, Thaddeus Seely, Bazaliel Seely, and Nathaniel Seely, Jr., all of Cornwall. Nathaniel was executor along with the wife of Garret Miller when Garret dated a Will 5 Oct 1777 probated 13 June 1778 Smith’s Cove, Cornwall (Garrett Miller, Jr., would also later remove to reside nearby the Seeley family in Chemung County, New York). Sometime after that date and before May 1780 Nathaniel and Jemima removed to Hardyston, Sussex County, New Jersey where Nathaniel appears on assessment lists of Hardyston Township. There is a 1779 assessment list for Hardiston and Nathaniel does not appear on that list, but he does appear on the May 1780 list.

May 1780
Nathaniel Seele
170 improved acres
10 unimproved acres
1 house
5 horned cattle
1 hog
2 slaves

Aug 1780
Nathaniel Seley
170 improved acres
10 unimproved acres
1 framed house
5 horned cattle
1 hog
2 slaves

Jan 1781
Nathaniel Seley
90 improved acres
100 unimproved acres
3 horses
4 horned cattle
10 hogs
1 tavern
3 slaves

Taverns were not assessed prior to the Jan 1781 assessment. These are the only known assessments for Hardyston Township for that time period. It is known the above assessments refer to the Nathaniel of this sketch as son, Israel was assessed in May 1780, Aug 1780, and Jan 1781 in Hardyston and some of Israel’s children are known to have been born in Sussex County. Nathaniel and Jemima’s son, James Seeley in his pension deposition stated his (James) family lived in Sussex County after the Revolutionary War. Nathaniel and Jemima’s daughter Jemima Seeley married Richard Edsall and resided in Hardyston.

Nathaniel and Jemima did not remain in Sussex County, but returned to Orange County. On 4 May 1784 Nathaniel Seeley and Jemima his wife leased property at Cornwell, Orange County for a period of ten years, the property consisting of a barn, orchard, garden, 100 acres of land, 100 acres of meadow, 100 acres of pasture, 100 acres of wood, and 100 acres of land covered with water. There is no record of Jemima after this date and it is unknown if she removed with Nathaniel and some of their children to what became the Town of Southport, Chemung County, New York, first a part of Montgomery County and then Tioga County before it became Chemung County. On 3 Nov 1788, lot 100 of 2,553 acres was surveyed to Nathaniel Seeley, Jr., James Seeley, Adam Seeley, Abner Hetfield, and Samuel Edsall in Chemung, Montgomery County, New York, which with further divisions became Newtown and then Elmira, Tioga County, and then finally the Town of Southport, Chemung County. They also acquired lot 143 of 1,426 acres. Nathaniel Seeley, Jr., James Seeley, and Adam Seeley were brothers and sons of Nathaniel and Jemima. Abner Hetfield had married Nathaniel and Jemima’s daughter, Elizabeth and Samuel Edsall had married Nathaniel and Jemima’s daughter, Sarah. Thus, is apparent the close relationship of these families who left Orange County, New York and Sussex County, New Jersey to settle on lands near the fertile Chemung River Valley. The Chemung River Valley and one of its tributaries, which became known as the Seeley Creek Valley where the Seeley family settled were rich and fertile valleys that saw an influx of settlers beginning in the late 1780’s, a few years after General John Sullivan and his army made their historic trek from Easton, Pennsylvania through the Wyoming Valley and north through the Susquehanna River Valley into the Chemung River Valley and on to the Finger Lakes region of New York, burning villages and destroying crops of the Iroquois in retaliation for the deaths of many settlers at Wyoming, Pennsylvania and to diminish the incursions on the western frontier. Many of the men with Sullivan’s army saw firsthand the vast expanse of valleys and the bountiful fruits and vegetables grown by the Native Americans and returned to settle after the Revolution and the end of hostilities. The Seeley families perhaps arrived in 1788 when it is related that daughter Elizabeth Hetfield and family arrived at that date. Grandson James Seeley, Jr., born in 1782, related he was six years of age when he came with his parents, James Seeley and Ann Westlake. From these records it has been assumed that several members of the Seeley family arrived in 1788. The Seeley party may have included Nathaniel and Jemima with sons Adam and Caleb who were single; son, Samuel Seeley and wife Mercy Bartlett and children (or they arrived a year or two later) son, Nathaniel, Jr., and wife Elizabeth Sayre and children; son, James and wife Ann Westlake and children; daughter, Elizabeth Hetfield and husband Abner Hetfield and children; and daughter, Sarah Edsall and husband Samuel Edsall.

In the Reporter Journal, Towanda, Pennsylvania, June 4, 1885 is given the following account:

“We will give some of Mrs. Sabra Seely’s recollections.Mrs. Seeley (Miss Sabra Ingalls) was born at Cooperstown, Otsego county, N. Y., Sept. 19th, 1876 (misprint and should have read 1796). At the age of six years she moved with her father’s family (James Ingalls) to Homer, N. Y., and there resided until she was twelve years old, when the family moved to South Creek township (Bradford County, Pennsylvania),and lived at or near Fassetts for something over a year. Then moved to Elmira (New York), and lived there until about 1822 or ’23, when her father moved to Wells (Bradford County, Pennsylvania). She married Strong Seely, a resident of the township, who died in August, 1872, at the age of eighty-six years. Mrs. Seely is yet living, a bright interesting old lady. . . Mrs. Seely makes the following interesting comments on the Seely family. Nathaniel Seely came from Orange county, N.Y., and purchased several hundred acres of land on Seely Creek - so named for him - laying between South Port Corners and the Beckwith Farm. When Mr. Seely came in he paid the cash for his land, and the same pocketbook, in which this money was carried, is held by his great great grandson, William Wilson, as an heirloom. Mr. Seely erected the first framed house in Elmira, and when a little girl I remember attending school in one part of it. Israel and James Seely already mentioned in the history of the township (Wells), were his sons.”

Nathaniel Seeley was enumerated in Chemung, Montgomery County (that portion that became Southport, Chemung County), New York in 1790 with one male of age sixteen and over (b. before 1774), one male under age sixteen (b. 1775-90), and two females in the household. However, it would appear that the family count for his son Nathaniel, Jr., enumerated in the next household, should be attributed to Nathaniel, which included three males over age sixteen and two females in the household, since it is known that Nathaniel, Jr., had a young son (Nathaniel) and a young daughter (Sarah) in the household. The three males over the age of sixteen were presumably Nathaniel and sons Adam and Caleb. The identity of the females is not known, but possibly one was Jemima, if still living. The other female was perhaps an unknown daughter as Jemima would have presumably been in her late thirties when daughter Sarah was born in 1772. Nathaniel and Jemima’s sons, James, and Samuel and son-in-laws Abner Hatfield and Samuel Edsall were all enumerated in nearby households. Tioga County was erected from Montgomery County on 17 Feb 1791 and the area they resided in remained in Tioga County until 1836 when Chemung County was formed. Nathaniel is related to have built the first framed house in the valley south of the Chemung River in 1792. Nathaniel appears on the 1794 assessment (tax) list of Newtown.

On 2 June 1794 (justice docket of John Miller, Esq. of Chemung) is a marriage for Nathaniel Seely and Anne Wire. This marriage can only refer to Nathaniel or his son, Nathaniel, Jr. Nathaniel Jr., is related to have married Elizabeth Sayre and on the 19 June 1792, Nathaniel Seely Junr., and Elizabeth his wife; and other members of the Seeley family conveyed land (Tioga County Deeds 1:30). This deed and several others clearly indicate that Nathaniel Jr., had a wife Elizabeth. On 28 May 1796 Nathaniel Jr., dated a Will in which he also named his wife Elizabeth. The marriage thus refers to the elder Nathaniel and Anne Wire must be Waier (Weare, Waeir, etc.) a family of Southport which resided nearby. She may be the Nancy Waier born 1744 died 12 July 1795 51y 4m 12d (ts) buried near Nathaniel in Fitzsimmons Cemetery. Jemima was then evidently deceased sometime before June 1794 though she is related to have lived for many years after Nathaniel’s death keeping a boarding house in the original dwelling they built (History of Chemung County by Towner). Jemima was not enumerated as a head of household in 1800 and none of her six known children living in the Seeley Creek Valley had a female over the age of 45 in their household in 1800. She does not appear in any other records further indicating that she was probably deceased.

Children of Nathaniel Seeley and Jemima Collins:
1. Samuel Seeley b. 2 Feb 1754 Cornwall, Orange County, New York.
2. Nathaniel Seeley, Jr., b. c. 1756.
3. Israel Seeley b. 31 July 1758.
4. James Seeley b. 9 July 1760 Oxford, Orange County.
5. Jemima Seeley b. 29 Jan 1762.
6. Elizabeth Seeley b. 14 Jan 1764.
7. Adam Seeley b. c. 1766-8.
7a.possibly John Seeley b. c. 1766-69 d. 20 Oct 1798 (ts) Fitzsimmons Cemetery.
8. Caleb Seeley b. 12 June 1770.
9. Sarah Seeley b. 8 Oct 1772.
10. possibly a daughter b. c. 1774 (one of two females in household in 1790; Jemima was only about 40 years of age in 1774 or younger).