The mysterious George G. LAMBERTSON and family was found in the 1860 census of Mason Co., KY. George was listed as age 28, born in New Jersey, and his occupation was that of M.E. [Methodist Episcopal] Minister. He appears with his wife Harriet, age 26, born Ohio; and two children : Isolina aged 2 and George L. aged 10 months.
In the 1870 census of Reily Twp., Butler Co., OH, Harriet LAMBERTSON is living with her brother Daniel JONES and his family. Only daughter Isolina is listed, so I presume that George L. died sometime between 1860 and 1870.
George G. LAMBERTSON appears in the 1870 census of 16th Ward of New York City as a Botanical doctor, aged 37, born in New Jersey. He has a new wife, Adelaide, aged 37, a Fortune Teller born in Connecticut.