Ibidem (June 1955 - 1979) magic periodical was edited by P. Howard Lyons from Toronto, Ontario, Canada for 36 issues. It was one of the most notable magic periodical in Canada's history. The emphasis was on card magic, although puzzles and recreational mathematics also appeared.
Only 50 copies of the first few issues were printed. Each cover was individually silk-screened by his wife Pat Lyons.
The publishing schedule was erratic. There was a ten years lapse between issue 34/35 (1969) and 36 (1979).
Issues contained contributions from Ed Marlo, Stewart James, Howard Lyons, Norman Houghton, Mel Stover, The Amazing Randi, Ken Beale, Tom Ransom, Francis Haxton, L. Vosburgh Lyons, Peter Warlock, Martin Gardner, Faucett W. Ross, Bill Simon, Tom Bowyer, Elmer Biddle, William Miesel, Alex Elmsley, Ravelli and Neal Elias.
Lyons also conceived a follow-on project called "Aziz", which would contain no design work, no editing and no-rewriting, just contributions "as is". Lyons unfortunately died before any issues were released. Max Maven took the collection of material that was gathered for the first issue and created seven issues. Maven also helped with getting the unpublished Ibidem 37 together. All this was published in the hardbound "Ibidem 3/Asiz and Beyond" (2003).
Reprinted by Karl Fulves in the 1970s (issues 1 to 12) and then in hardcover by Hermetic Press (volumes 1, 2 and 3). The reprints have additional material - the missing issue No. 37, and the material tabled for Aziz, and several other items.