I will begin with Jabez Olmstead Jr. who is familiar territory with me. He was born around 1773 and was probably the son of Jabez Sr. and Miriam Husse Olmstead of Hebron, NY. He was married first to Eunice and moved to Burritt’s Rapids, Ontario in 1799. The first record is an application for leasing of lot 28 in Marlborough Twp. This family, consisting of Jabez 28, Eunice 27, Hiram 3, and Noah 2, was listed in the early assessment records of Burritt’s Rapids in 1802. Since there has been no further record found of Jabez Jr. and Eunice in Ontario after 1803, my assumption is that they returned to Hebron, NY.
The federal and state census records of Hebron confirm that there were at least two Jabez Olmstead’s enumerated from 1790 through 1825. An older Jabez (with a small family) in 1790 and 1800 and a younger Jabez (with a large family) in the years following. My guess based on all evidence collected over the years is that Jabez Jr. returned from Ontario to Hebron by 1803, possibly because his father was ill or had died.
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[cos1776 note: original link provided is dead. This is probably from the Jabez Olmsted of Ware newsletter]