there is a small comment at www.manxnotebook.com/famhist/genealgy/sw1826.htm - they were part of a much larger party apparently led by John Sayle.

You can do most of your genealogy before arriving on the Island (mormon microfims cover most) - once on Island then Manx Museum Library (open 10-5pm Mon thru Sat) is the main respository - if you arrange to come for Tynwald day (5 Jul) then the homecomers' tent at Tynwald fair houses the IoM Fam Hist Soc - otherwise contact them via the web - their library at Peel has many family trees as well as copies of many of the parish microfims.