As in the case of your other posting, on the Lacours family, I checked your family tree posted on Ancestry.com and did not find your connection to a Longson family. If your facts as given are correct, there would be no information on them in the Custer County, Idaho area. You will need to repost in the Fall River, Massachusetts area, that would be the Bristol County Board.
http://boards.rootsweb.com/localities.northam.usa.states.mas...You can find some information here:
http://www.rootsweb.ancestry.com/~mabristo/mabristo.htmRon Bestrom
Tacoma, WA