From Fanny J. Crosby, "Memories of Eighty Years" (James H. Earle & Company, Boston: 1906), p. 2 #21 http://www.disabilitymuseum.org/lib/docs/1653.htm?page=2#21 Disability History Museum, www.disabilitymuseum.org,
"My great-grandfather, Isaac Crosby, was noted for his wit. While in the Revolutionary War, wishing a furlough that he might visit his home to see a child born during his absence, he told his general that he had nineteen children at home and had never seen one of them. Of course his request was granted. He was the son of Eleazer Crosby and Patience Freeman, the grand-daughter of Elder William Brewster; and through Zachariah Paddock, another ancestor on my mother's side, we are also descended from Thomas Prence and Major John Freeman." (Fanny's mother's maiden name was CROSBY.)
If Isaac's wife was still of childbearing age following the incident related above, it is possible that he had even more children than nineteen. One problem with this recollection is that no Isaac CROSBY is listed in the Dutchess County revolutionary war militia records in print. Perhaps it was another conflict?