Space Cage was a science fiction fanzine by Lee Anne Tremper, now known as Lee Anne Lavell.
Published in Indianapolis, Indiana, U.S.A., Space Cage was the official organ for the Indiana Science Fiction Association. The first issue appeared in February 1960. At least eight issues were released.
The fanzine featured the "Space Page", with was edited by Jim Lavell. He invented the non existent fan Mrs. Pboth to issue the meeting notices. As Lee Anne Lavell tells in in the pages of Askance # 10, the expression was derived from a real life member of the ISFA; "Jim was doing the editing and publishing of "Space Page" and in one issue he thought it would be funny to compare mary Rita to a character in Peanuts, so e had as a running jole the phrase "Mary Rita Schlichte pats birds on the head". Je ended the notice with the acronym for the above: MRS/PBOTH". However, several people didn't catch on and wanted to know who Mrs. Pboth was."