Jemima Cass (or Gass) Dickey was born about 1789, date varies by source, at Franklin Co PA to James and Margaret ne'Cass/Gass/Glass Dickey. She married Thomas Robison (also seen as Robinson) on 12 Nov 1816 at the home of Alexander and Agnes ne'Dickey Robison in Westmoreland Co, Pensylvania. Thomas and Jemima moved immediately to Wooster, Wayne Co, Ohio where Thomas had already established himself financially. Because he left Wooster and married Jemima at his nativity, and immediately returned to Wooster, it appears they were promised to each other some time earlier. Thomas was born on 8 Apr 1791 about 6 miles outside Rocky Springs, Franklin Co, PA which is near Chambersburg. Thomas served in the State Senate of Ohio from 1832-36 and held other public positions in his lifetime. He was a Justice of the Peace, Sheriff of Wayne Co, and a Judge in the Court of Common Pleas as well as other posts. He was a carpenter by trade. He was in business in Wooster, Wayne Co, OH with his brother, David, for a few years. I have only found 3 children attributed to this union (so far) : (1)James Dickey Robison who became a well known Medical Doctor b.23 Apr 1820 (2) Sarah Robison b.15 Oct 1828 whose descendants are on rootsweb.com (3)Martha Robison b. 1832. Thomas died at Wooster, Wayne Co, OH on 14 Sep 1857 and Jemima died at the same place on 10 Mar 1869. (Bio is by Kate Lund, originator of this memorial.)
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Jemima Robison's obituary indicates that she died at the residence of her daughter and son-in-law, Mary Jane and J.K. McBride, March 16, 1869 in the "80th year of her age." The specific day of March is illegible; newspaper date is 25 March 1869. Birth year was changed to circa 1791. Dates differ according to source.
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The following is submitted for perusal from a WikiTree;
http://www.wikitree.com/wiki/Dickey-694

James Dickey
Born about 1725 [location unknown]
Son of John Dickey and Martha McNEELY
Brother of William Dickey and Nancy Ann Dickey
Husband of Isabel Hutchinson — married 1751 in Cumberland County, PA
Husband of Margaret Gass — married after 1788 in Cumberland Cty, PA
Father of James Dickey
Died October 3, 1804 in Peters Township, Franklin Cty, PA

AND

Note N287 Here is a copy of his will as taken from the Abstracts of Wills and Administrations of Franklin County registered at Chambersburg, PA vol b. page 216. James Dickie, Senior, of Peters township; dated Dec 22, 1802; proved October 3, 1804; plantation to be sold in eight years and proceeds divided as follows: son John ninety pounds, son James five pounds; son Robert ninety pounds; daughter Sally Latta eighty pounds; daughter Nancy Robison one hundred pounds; wife Margaret three hundred pounds; daughter Jemima Gass Dickey five hundred pounds; Alexander Boyd fifteen pounds; Exrs: Son John and Frederick Shearer; Wit: James Irwin, John Alexander. Note N716 Taxed in Franklin county 1751-2 Was on Tax Rolls for Franklin County, Peters Township 1786,[2][3] Note N77 1751 Taxed in Peters PA on first Cumberland County list 1790 Census 4-2-1 1803 5 August James Dickey mentioned in a land transaction. to be sold Tuesday September 13th, agreeably to the last Will of William Donaldson, a Valuable Tract of Patented Land in Peters Township, adjoining James Dickey, Peter Sheer and others, 220 acres. Samuel Walker., John Speer, Executors. 1804 3 October James Dickey's will probated in Peters (Franklin) PA Dickey, James, Sen. of Peters Twp.. , dated Dec. 22, 1802, proved Oct. 3, 1804, plantation to be sold in 8 years and proceeds divided as follows: son John £90, son James £5, son Robert £90; dau. Sally Latta £ 80; dau Nancy Robison £100; wife Margaret £300; dau. Jemima Goss Dickey £500; Alexander Boyd £15; exrs.: son John Dickie & Frederick Shearer; wit: James Irvin, John Alexander,[4]
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Perhaps Agnes (Dickey) Robison was an aunt Jemima Cass (Dickey) Robison.
Agnes (Dickey) Robison (1751-1817) : Find A Grave Memorial# 108419084
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HISTORY OF WAYNE COUNTY,, OHIO
http://www.mocavo.com/History-of-Wayne-County-Ohio/366028/356
WOOSTER—SKETCHES, pp 336-337:

Thomas Robison.
April 8, 1791, Thomas Robison, father of Dr. J. D. Robison,
was born in Franklin county, Pennsylvania, within six miles of Chambersburg, near Rocky Springs. His father came from York county to Franklin, where he died. Thomas left Franklin county in 1806, removing to Columbiana county, Ohio, and remained there until the spring of 1807, when he went to Zanesville, and remained there until the following December. He then went back to his native county in Pennsylvania, and learned the cabinet- making trade in Chambersburg, working as an apprentice for three years. He then returned west, and landed in Wooster, November 15, 1813, in company with his brother, David Robison, Sen. On their arrival, David and Thomas bought a tan-yard from a man named John Smith, who subsequently, in 1824, became Sheriff of Wayne county. The tannery is the one located on North Buckeye street, and now owned by George Seigenthaler. Thomas, at the same time, started a cabinet-shop on North Buckeye street, where Shively's barn now is, he running that branch of business and David the tannery. In a few years the brothers dissolved partnership.

In the fall of 1816 he went to Westmoreland county, Pa., where he was married, on the 12th of November, to Jemima Dickey, atthe residence of Alexander Robison, returning with his bride to Wooster, December 20, 1816. He sold out his cabinet establishment along about 1830, when he joined in mercantile pursuits with Moses Culbertson, on the
north-east corner of the Public Square, now occupied by J. S. Bissell & Brother. After being a while in trade they sold their store to Jacob Eberman. Several years afterward, say in 1839, Mr. Robison again engaged in merchandizing with Wm. Jacobs, brother of James Jacobs, and after a successful career retired from commercial pursuits.

He was one of the most popular men in the community. Soon after marriage he was elected Justice of the Peace, and thereafter was the choice of the people for several offices. He was Sheriff of the county from 1828 to 1832; member of the State Senate from December 3, 1832, to December 5, 1836, having been re elected in 1834; was chosen one of the Associate Judges of Common Pleas Court in 1848, besides filling several other less important offices, such as Director and Superintendent of the Wooster and Cleveland Turnpike, etc. In religion he was a Presbyterian, and was Moderator of one of the earliest Presbyteries held in Wooster, proving himself by success to be one of the most zealous members in efforts to procure subscriptions and money to build the old brick Presbyterian church on West Liberty street. He died suddenly in Wooster of neuralgia of the heart, on the 14th of September, 1857, his wife surviving him until March 10, 1869.

Thomas Robison was an exceedingly popular and enterprising
citizen, and held in universal esteem by all who knew him. He was full of good humor, and was kind, benevolent and cordial. In his positions of public trust he sustained a reputation for honesty, fairness, fidelity and integrity.
He was conscientious and sincere in purpose ; of magnani-
mous and indulgent disposition ; an unassuming, buoyant-minded, hopeful, earnest, Christian gentleman.
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Contributed 7 August 2021 by Linda Schwenn FIND A GRAVE ID 47100889:
Per Jemima's birth:
Mercersburg Presbyterian Church of the Upper West Conogogheaue
Pennsylvania and New Jersey, U.S., Church and Town Records, 1669-2013, Ancestry.com.
Baptisms
7 Apr 1782 James, son of James Dickey
10 Oct 1789 Jemima, dau of James Dickey Jr.