Edward Gorey created many postcards over the years, both as individual cards and as themed packs. In 1989, he published Menaced Objects, Dogear Wryde Postcards, a postcard set that consists of 16 illustrated postcards issued in an illustrated envelope. This collection shows objects in situations which usually appear to be harmless enough - until you read the captions on the reverse side of each card.
The postcards were available as a signed, limited edition of 250 numbered packs, and were also sold as a "trade" edition which without the limitation. The limitation appears on a separate colophon card in the pack. Surprisingly, the set is signed by "Edward Gorey" and not "Dogear Wyrde". I have a regular trade set, and am showing set #68/250.