Wow, folks. Chrispy almost missed seeing this one. It's nearly sold at the time of this printing at about $224.00 with over 30 bidders. (Not me.)

The seller states:

ENVELOPE (4 X 6.75 INCHES) ADDRESSED BY H. P. LOVECRAFT TO CLARK ASHTON SMITH. LOVECRAFT'S SIGNATURE AND RETURN ADDRESS ON THE REAR OF THE ENVELOPE. BOTH ARE IN LOVECRAFT'S HAND AND ARE GUARANTEED AUTHENTIC. POSTMARKED 1930 IN PROVIDENCE, RHODE ISLAND. ... ORIGINAL LOVECRAFT SIGNATURE ON AN ENVELOPE ADDRESSED TO ONE OF HIS BEST FRIENDS. BOTH ARE ICONS OF EARLY HORROR LITERATURE. ENVELOPE HAS SOME SMALL TEARS, NONE AFFECTING LOVECRAFT'S HANDWRITING.