Oliver Forsyth was the son of Isaac Forsyth and Francis Brown. He was born about 1796 in either Hanover, York County, Pennsylvania or in Baltimore, Baltimore County, Maryland. In the 1880 Federal Illinois Census for Chili Township in Hancock County, his son, Alpha, lists that his father was born in Maryland. He probably died in Kentucky, before 1834, when his family emigrated to Adams County, Illinois. Mrs' Fitting's research found no orphans of Oliver filed in Bourbon Co, Kentucky, which probably means the family moved to Adams County, Illinois, shortly after his death. He is listed in the 1830 Federal Kentucky Census for Bourbon County, and was certainly dead by April 1, 1838 when his wife issued a IOU to Isaac Adair in Illinois. The descendants of Denmark Forsyth state that Oliver is buried in St. Louis, Missouri and died on thier migration.
The Worrell and Hyslop descendants of Alpha Forsyth (who were closely tied in the early years) claim his middle name was Franklin, however, the only official documents we have for him show his middle initial as 'A' in one case and 'D' in another.
He married Margaret Layson, daughter of John Layson and Margaret Martin, in Bourbon County, Kentucky on 31 December, 1818. Their bond, dated 20 December, 1818 lists her as Rebecca, but this is undoubtedly a nickname. In an article entitled 'Earlly Bourbon Families: Layson Family' published in the Kentuckian Citizen Newspaper, date unknown, Margaret Layson was said to have married Denmark Forsythe (Oliver's brother), This is an obvious error as Denmark's family is well documented.
Margaret was born in Kentucky, as stated in the same census. She was probably born about 1794 as she is listed as between 16 and 26 in the 1810 Federal Census for Bourbon County, Kentucky, and 1794 would have therefore been the latest date applicable. She died between 6 July 1840 and 5 Sep 1840 in Adams County, Illinois. These dates were based on her estate papers.

Oliver and Margaret had 6 children:

Alpha Layson (5 Jun 1819 - 4 Sep 1891) m. Lucinda Ann Witt
Elizabath Pond "Eliza" (5 Jun 1819 - 18 Mar 1906) m. 17 Mar 1842, Hancock County, IL, Daniel Coleman Mustain, 7ch
Margaret (bet 1820 and 1830 - Aug 1839)
Susan A. (1825/28 - 1852) m. 20 Mar 1851, Adams County, IL, Zachariah Woods (ch. Mary Ellen Wood (1852-1918))
Mary Jane (1827/1830 - 20 Apr 1904) m. 3 Jan 1850/51, Adams County, IL, Archibald Owen (1820-1887) Children: 1. Amelia Thompson; 2. Mary Frances married Joseph A. Simpson; 3. John; 4. Elizabeth married Christian L. Williams; 5. Chauncey born 1869; 6. Caroline; 7. Charles died in infancy; 8. Thomas died August 1934; 9. Archibald born 1875
Franklin (1832/35 - Aug 1839)

Some of the chldren appear in the November 1840 Federal Illinois Census, for Adams or Hancock Counties. Alpha is listed as the head of household with 1 male aged 20-30 which must be himself, 1 female aged 20-30, which must be Eliza, 1 female 10-15, which must be Susan A., 1 female 5-10 which must be Mary Jane who would have been 10, and 1 male 5-10, which must have been Franklin. Franklin and Margaret were thought to have both died in about August 1839, when their mother had ordered and bought coffins for a son and daughter. Yet, Franklin appears over a year later in the 1840 census, but is not heard from again.
My grandmother, and her sister-in-law, both list Oliver's middle name as Franklin. Laura Stevenson listed his son as Alpha Franklin Forsyth, on one occasion, but on others as Alpha L. Forsyth. She also listed Oliver as having no middle name. Her letters are known to be quite confusing, and often mixed up. In the land records for Paris, Bourbon County, Kentucky, On 6 July, 1829, Oliver D. Forsythe and his wife Margaret sold 50 acres of land, which she inherited from her father John Layson, to Charles D. Lenox for $1000. Then on 17 August, 1830, Oliver A. Forsythe sells goods to Charles Lenox for $1 as his portion of $90 owed to Henry Bridges. Neither of these last two references is written in Oliver's hand, and both may have been a mistake by the county clerk, Thomas P. Smith, who also appears to have added an 'e' to the end of the name. My assumption is that Franklin is his middle name, and was passed down through the family.
Oliver and Margaret sold land in Bourbon County, Kentucky on October 12, 1829 to Charled D. Lenox for $1000. Then on August 7, 1830 they sold him chattels (property) for $1.00. This indicates that Charles was possibly a relative, since Kentucky did not allow giving property away to relatives. He may have been a brother-in-law. Possibly the Forsyth's were preparing to move, however in the 1872 Plat book for Houston Township, Adams County, Illinois, their daughter Eliza stated that came to Illinois in 1834. No record for Oliver is found in Illinois.
The estate records for Margaret show her purchasing from Isaac Adair in 1838 and 1839, sugar, tea, coffee, muslin, flax linen, silk, thread, buttons, nails, and medecine for a sick horse. Then in August of 1839, Margaret is buying medicine for 3 persons, including Franklin (presumedly the son) from Dr. Calvin Brown, and also in August of 1839 she purchases 2 coffins, for her son and daughter. On July 6, 1840 she purchaes a coffin for herself. The warrant for her appraisement was issued on September 5, 1840; by this date, she must have passed away. Her estate sale was September 19, 1840 at which time her estate contained the following: 2 steers, 7 cows, 4 horses, 6 sheep, 24 hogs; several acres of corn, oats, and wheat; 2 axes, a hammer, a scythe, gears, 2 hoes, 2 harnesses, a gun, a bridle, 9 bee stands, a plow, books, a spining wheel, a loom, 4 beds, miscellaeous household furniture, a cupboard, a breakfast table, chairs, a work stand, barrells, a bureau, a harrow, 2 flat irons, cooking utensils, pillows, a flax wheel, and stetchers and levis - apparently they wore jeans.