Gilbert G DART is my GG grandfather who married JERUSHA STEWART abt 1824-26?? they lived in OH and KS. A DR. DART is thought to be the father of URIAL, CHAUNCEY, and GILBERT G DART. This is info from a SUESSA LOUISE DART BOICE and the "DART FAMILY IN AMERICA" 1954. According to the census of NY, OH, and KS, GILBERT was born in NY (FABIUS ?). URIAL and CHAUNCEY lived in Chatham CT in early 1800's.
I find this info of the KILBOURN Genealogy very interesting and something that we need to definitely check out. This could be our link to the DR DART mystery. The time period and place would certainly be right and the name MARY/POLLY would be the same. Thanks so much for this info !!!