Horizons began as a general fanzine in October, 1939 and produced on the DDT&T mimeo while Warner was also publishing Spaceways, but starting in mid-1940, after five issues, it became a fapazine and continued almost uninterrupted until Warner's death in 2003.
According to Robert Lichtman, in Trap Door #22: "He missed only one mailing in 1943 due to serious illness and another in the ‘90s because the parcel containing the issue went astray. There was a total of 252 issues, the final one appearing in this year’s February mailing. It’s safe to say that no one is likely to top Harry’s 64-year record of regular publication of the same title."
The very first work towards All Our Yesterdays appeared in Horizons.
|27||June 1946||12||FAPA V7.4|
|28||September 1946||12||FAPA V8.1|
|68||Winter 1956½||24||FAPA V18.2|
|This is a Stub Fanzine page. Please extend it by adding information about when and by whom it was published, how many issues it has had, (including adding a partial or complete checklist), its contents (including perhaps a ToC listing), its size and repro method, regular columnists, its impact on fandom, or by adding scans or links to scans.|