two binders with approximately 300 covers covering many different aspects of Chicago postal history, neatly arranged by marking and chronologically, includes (but is not limited to) "Address Changed or Completed", "Address Supplied By...", "Adhered to...", "Found in Circulars", "General Delivery", "Received Without Address/Contents", "Returned for Better Direction", "Special Identification Required", "Stamps Removed Before Receipt", "Unclaimed", "Unmailable", "Name Not in Directory", "No Post Office Named", and more, condition generally fine to very fine, an extraordinary collection obviously representing a lifetime of work, many covers illustrated in the Piszkiewicz book, view to appreciate as this lot is difficult to describe simply in words