Thanks for getting back to me. Sarah Ann Henshaw was born December 15, 1825 in Erin Township, Wellington County and she was married to Archibald McAlister on August 3, 1847 in Erin. Sarah died June 12, 1916 in Erin.
There may not be a link, but the names seemed right. If there is no connection, do you know how I could get in touch with the other people you mentioned searching McAlister's?