H.P. LOVECRAFT CENTENNIAL 1890-1990 A philatelic publication issued on the Weekend of Events Celebrating the 100th Birthday of the Great Horror Writer College Hill, Providence, R.I. Friday, August 17, 1990 to Monday August 20, 1990 Pawtucket, R.I.: The Lovecraft Philatelic Group, 1990. First edition. Dinosaur set! Set of four cache envelopes with the August 18th, 1990 cancel. Fine and unused. During the four day Centennial celebration at Brown University, the U.S. Postal Service agreed to to cancel letters and stamps at The official Summer of Lovecraft Postal Station at Brown University. The cancel was used only during the four days of the celebration. Covers have a single cancel (dated Aug. 18th, 1990) each with different dinosaur stamp. SCARCE AND UNUSUAL ITEMS OF LOVECRAFT AND PHILATELIC INTEREST FREE SHIPPING TO THE USA PLEASE VIEW OUR STORE FOR MORE GREAT ITEMS THANKS! Created by Seller's Assistant Basic.