Hello! All the settlements west of the Susquehanna River were part of Lancaster County in 1745. York County was created in 1749 and Cumberland in 1752. The inconvenience of traveling long distances to record deeds, administer estates, and so on was one reason why people always wanted large counties reduced in size and court houses closer to home. It was also the reason why many deeds were not recorded (only quoted in later deeds) and some smaller estates not legally administered. There is a printed index of Lancaster County wills and administrations. I can't remember the compiler's name. If your man is in it, you can find some documentation. If he isn't, there is no record of any will having been probated or administration of an estate and there never was. Lancaster County Historical Society has inventories/appraisals and/or accounts for many, not all, estates settled in Lancaster County within whatever its boundaries were at that time. They can produce them with the name and date. A great many are readily available in the surname folders in the LCHS because someone ordered a photocopy and they always make two, one for the surname file. The Court House should have administration bonds. My memory is that they are recorded in the records of the Orphan's Court which are well indexed and readily accessible in the CH. All the best, Richard MacMaster