At last!! found the 3rd LP version of "Let the snakes..."
The famous Felt archeologist J.B. just cracked up an ancient Felt myth that lasted for decades: The 2nd LP version of "Let the snakes...". I remeber that when I started the Felt tribute site, I included this version, without any evidence of his existence.
Acording to Jon, the 3rd version has the close-up photo, with only the album title on the cover. This 2nd version is very similar, to the 3rd, except it has "Felt" printed on the sleeve, just above the album title.
Probably never actually issued or withdrawn.