Kathleen has it exactly right. Start checking in Northumberland Co. , but remember the earliest records of that area ,now Bloomsburg , were Wyoming TOWNSHIP and Bloom TOWNSHIP of Northumberland Co. Sorry I do not have the specific dates but some areas now considered Bloomsburg (like the area at the point of Fishing Creek & the River ) were Wyoming Twp. Tax records on microfilm are available. All Columbia Co. records from it's beginning in 1813 are at Bloomsburg Court House. The earliest Deed book has records that applied to the area were copied over from Northumberland Co. by a special State permission. This was to make the pre-1813 deeds easily accessible locally. All this makes it a real puzzle , especially for researchers that live outside PA and never resided in these Counties. All the best in your search. Loraine Danville, Pa