This is described as an old abandoned cemetery in Pittsburg County, Oklahoma, located about a half mile southwest of what once was Blackburn Station on the Butterfield Stage Mail route. Blackburn Station was about 9 miles southeast of the town of Pittsburg, lying between Indian Nation Turnpike and Brushy Creek. Here is the location: https://www.google.com/maps/place/34%C2%B041'05.4%22N+95%C2%B044'39.5%22W/@34.6796336,-95.8104878,12.75z/data=!4m5!3m4!1s0x0:0x0!8m2!3d34.68484!4d-95.74431

Blackburn's Station is listed on the National Register of Historic Places.
https://npgallery.nps.gov/NRHP/AssetDetail?assetID=578d4467-2e8d-4726-b497-4471cf0ba8f6
9 m. ESE of Pittsburg, OK
SE/4 SE/4 Sec. 5, T2 N, R 15 E

Blackburn's Station
When they traced out the Butterfield route in 1950, the Conklings could find only some chimney stones and a nearby cemetery. They put down their findings this way: As early as October, 1858, a small settlement known as "Brushey," evidently named for the near-by flowing creek, existed in the vicinity that may have included Blackburn's within its borders. In a thick wood southwest of the station site are a number of old graves.
This is said to be old Brushey cemetery.
In 1858, one J.G,Blackburn kept a store at Brushey, and judging from the numerous consignments of merchandise to him at that place, waybills of which were found among the records of the old commission house of 0. G. Wood & Company of Fort Smith, he carried on an extensive trade for that day. Blackburn's Station, however, perhaps a half-mile northeast of the cemetery, was at the home of Casper B. Blackburn. A Missourian, he had moved to Indian Territory some years before, married a Choctaw woman. The Civil War ended Butterfield service, of course. And after the war Blackburn acquired a ranch near present-day Kiowa, some miles to the northwest. Brushey in the meantime did acquire a post office, in July 1869, with Friederick Schmallfield appointed postmaster. Today Blackburn's Station has virtually disappeared, and even the nearby community it helped to support is not easy to find in what is still a relatively rugged, hilly section of old Indian Territory. Yet a century and more ago it was an important link in a continent-spanning chain of communications that still represents the nation's most dramatic commercial ventures. As such it would seem worthy of National Register designation.

As late as 1930 one could still locate a heap of chimney stones in a small clearing beside an abandoned road - the last physical evidence of Blackburn's Station, No. 6 of the twelve stands established by the Butterfield Overland Mail along its slashing 192-mile route across Indian Territory from Fort Smith to Red River. Today even the site itself cannot be located precisely with absolute certainty. And, ironically, one inhibiting factor is the terrain changing that has accompanied construction of the Indian Nations Turnpike, a smooth, multi-laned communications great-grandchild of the "rough arid stony" Butterfield route itself. Indications of the latter can still be found in this area, however. And, as mentioned in No. 8, the all-but-obliterated Brushey Cemetery gives a clue as to the location of the Brushey community. A short distance to the southwest, in the same section, is the Colbert crossing on Brushey Creek. But such permanent materials as were used in the various buildings of the town and stage station have long since been scattered, some to be removed and re-used in other structures in the area.