Update on Delaware County, PA tax lists

I received a response to a query about the Delaware County tax lists a week or so ago but I've been so backlogged lately with work that I haven't had a chance to update the info here yet. It appears that the first information I received from a reference librarian at Neumann College, which stated the tax dockets had been sent to the Delaware County Historical Society, was incorrect. A different employee at the Neumann College Library says that they were moved to the Delaware County Archives not the Historical Society. So now I will attempt to confirm this with the Archives and post yet another update here as soon as I hear something back.