Short story recommendations

Lord Dunsany
In the Land of Time
http://www.sacred-texts.com/neu/dun/tago/tago18.htm
The Fortress Unvanquishable, Save for Sacnoth
http://www.sacred-texts.com/neu/dun/swos/swos10.htm

H.P. Lovecraft
The Call of Cthulhu
http://www.sacred-texts.com/nec/hpl/hpl31.htm
The Colour out of Space
http://www.hplovecraft.com/writings/texts/fiction/cs.aspx

Robert E. Howard
The Phoenix on the Sword
http://gutenberg.net.au/ebooks06/0600811h.html
The Tower of the Elephant
http://gutenberg.net.au/ebooks06/0600831h.html

Clark Ashton Smith
The Double Shadow
http://www.eldritchdark.com/writings/short-stories/53/the-double-shadow
Ubbo-Sathla
http://www.eldritchdark.com/writings/short-stories/224/ubbo-sathla