In the 1850 census the couple and kids Thomas and William are living in Middleburgh, Cuyahoga, Ohio, USA. Their oldest son John was living with the Solomon Soles family nearby possibly as an apprentice as Solomon was a cooper. According to the 1850 census, all of their kids were born in New York, so you might look for a marriage record in New York. Also, the 1900 or perhaps 1910 census asked couples how long they had been married.
Edit, I found the son Reverend John's biography on Ancestry. He was born 23 Nov 1835 in New York City. When he was 8 years old his father lost his health and property. The family moved from NYC to Bloomfield, NJ and soon thence to Cleveland OH.