Born circa 1792 Harriett Townsend, daughter of Hewlett Townsend of Cedar Camp, married Paris Mason 7 October 1815.By 1820, the Mason family was settled in Edwardsville, Madison County, IL. The year 1840 finds the family living at Grafton, Jersey County, IL and in 1850 the couple's daughter, Mary E. McCrillis, and her family lived with Paris and Harriet Mason. Harriet Mason nee Townsend probably died in Grafton and death date remains speculative.

marriage viewed at Ancestry copied to right: Paris Mason in the New York, Marriage Newspaper Extracts, 1801-1880 (Barber Collection)
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Material to peruse:
Descendants of Richard Scarritt of Branford, CT:

PARIS5 [sic] MASON,... born May 24, 1789, in Grafton, New Hampshire; married, October 5, 1815, Harriet Townsend, daughter of Hewlett and Ann (Birch) Townsend. She was born December 15, 1795, in Cedar Swamp, Long Island, New York. They removed to Edwardsville, Illinois. Paris Mason died November 9, 1853. His wife, Harriet, died January 25, 1853.
Children of Paris and Harriet (Townsend) Mason:
779. i. Mary Elizabeth, born December 21, 1816, in Cedar Swamp, Long Island, New York.
780. ii. Martha Ann, born April 1, 1819.
781. iii. Paris Hewlett, born December 5, 1820.
iv. James Perez, born May 29, 1825; died July 10,1851, in Havana, unmarried.
v. Sarah Maria, bom October 20, 1829; died April 14, 1830.
vi. Harriet Louise, born November 17, 1831; died July 24, 1832.
The five younger children were born in Edwardsville, Illinois.
http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=scarritt&id=I1456
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1850 United States Federal Census
Name: Harriet Mason
Age: 57
Birth Year: abt 1793
Birthplace: New York
Home in 1850: Grafton, Jersey, Illinois
Family Number: 33
Household Members:
Paris Mason 63 [merchant]
Harriet Mason 57
L F McCrillis 39 [lawyer]
Mary E McCrillis 32
Harriet A McCrillis 12
Sarah A McCrillis 9
Mary A McCrillis 7
Martha M McCrillis 5
Paris M McCrillis 3
John Patterson 21
Patrick Gillroy 24
James McKenna 26
John Mooney 18
David Reynolds 26
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For an outline of the Harriet Townsend line, please note below.

"A memorial of John, Henry, and Richard Townsend, and their descendants" - NEW YORK: W. A. TOWNSEND, PUBLISHER,1865 [#227]:

HEWLETT married Annie Hewlett, of Merrick.—
Issue, Timothy, Elizabeth, Hewlett, Ann, Richard,
Mary, Sarali, Phebe, Jemima, Harriet, and George.
The last died unmarried.
Timothy married Abigail Mott.
Elizabeth married Jacob Townsend. (See Jacob, of
Prior, Chap. VII.)
Hewlett married Ethelene Coles. — Issue, Sarah, Jane,
Charlotte, Elizabeth, Freelove, Harriet, and Marie.
Sarah married Daniel McCoun. Jane married John D.
Hewlett. Charlotte married Philemon Frost. Eliza-
beth married John D. Hewlett. Freelove married Wil-
let Weeks. Harriet married Thomas Albertson.
Anne married Benjamin Coles.
Richard married Elizabeth Hewlett. — Issue, Stephen,
who married Jane Garvie.
Mary married Robert Underbill. — Issue, Anne E.,
who married George Underbill.
Sarah married Rowland P. Allen.
Piiebe married Jackson S. Townsend. — (See Jackson,
of Richard^ Chap. XVI.) — Issue, Timothy, who married
Elizabeth Saxton.
Jemima married Jackson S. Townsend. — Issue, John.
I. and Phebe A., who married, first, Alfred Cock;
second, Jacob Underbill.
Harriet married Paris Mason.
https://archive.org/stream/memorialofjohnhe1865newy/memorialofjohnhe1865newy_djvu.txt
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daughter: Mary E. McCrillis, Find A Grave Memorial# 23525660
daughter: Martha Ann Scarritt, Find A Grave Memorial# 89735517
daughter: Sarah E. Walworth, Find A Grave Memorial# 77028097