I looked to see what I could find in Hinshaw's Quaker Encyclopedia, but first a couple things I think would be helpful. Quakers used a different dating system, and no date of theirs would EVER be December....if you're interested, here is a site that explains it...http://hawkshome.net/misc_items/quaker_dating.htmtobut suffice to say many people misread dates...they see 12m, 2day, 1800 and think that is December...but, in Quaker dating, 12 mo does not refer to Dec.... Another thing that should be helpful....an understanding of how Quakers met, etc.Weekly, Quakers met at a PM or preparatory meeting...these were often in the homes of the members, but records were not kept in the PMs....next, there were monthly meetings, when more than one PM met together, once a month, and the records were kept there, in the MMs.Next were Quarterly meetings which included many MMs meeting 4 times a year....and, yearly meetings, attended by large groups of Friends from a large geographic area.Pipe Creek is a PM of the Fairfax MM, in Loudoun Co, Va, thus there are no records kept in a PM....and, the only mention I find of Samuel in Hinshaw is in the Fairfax MM: Samuel Cookson, recrq (received by request, meaning that he was not a Quaker before this timeframe, and he was joining the Friends by his own request) the date is 28d, 11m, 1772.He was 'assigned to Pipe Creek PM' by the Fairfax MM. I can't find a Bush Creek meeting, but there is a Bush River meeting, in Newberry Co. the west central part of SC, ....where did you think that Bush Creek was?Could these be the same?There is no mention of Samuel in the Bush River meeting records, in Hinshaw, but I think it only has the Births and deaths included. Unfortunately, there is no single source for Pa meetings, so you'd have to have a bit more info before knowing where to look. Good luck.