While genealogical queries are certainly on-topic for this board and the list that board posts are gatewayed to, it is not the best place to have your MacPherson queries seen by family history researchers. The primary purpose of this list/board is Clan MacPherson matters.
A better place to post queries are the surname lists and/or boards. To find the MacPherson Message board, just type MacPherson into the Find A Board box at the bottom of any Message Board screen. And since the McPherson version of the surname is more common, you might try joining the McPherson list, http://lists.rootsweb.com/index/surname/m/mcpherson.html
. While there is also a MacPherson list, it is rarely used.
By the way, it would help us help you if you mentioned *where* this family lived. Canada, Scotland, USA?