Re: Gen. of Sharpless Family by Gilbert Cope
Gilbert Cope's genealogy collection was given to the Historical Society of Pennsylvania about 1920. Much, if not all, of it has been microfilmed and is available through the LDS Family History Centers. I've never looked for Osborne, but I've found most of my Chester and Delaware County families on the microfilms of his work.
You might check out message #175 under the Cope Family Genealogy Forum. It contains a bibliography of Gilbert Cope's published works.