I am looking for two marriages which likely occurred in Onondaga Co. Families were living in Elbridge in the 1830 census. Franklin Miner married Thankful Greaves/Graves, 7 June 1822. Sylvester Stevens m. Elizabeth Graves, born 1808, abt. 1825-1826 (oldest child was born 1827). It appears from website links that the county didn't keep vital records until 1870s? Appreciate any help about where to look/write?