|Location of Publication||New York, New York USA|
|Story Location||Unidentified Southwestern desert; Buchanan's Butte (First appearance), Sirius (First appearance) (Only in flashback), New York: Westchester County, Ohio River (First appearance)|
|Notes||Double-sized issue reprints X-Men #21: "From Whence Comes... Dominus?" and X-Men #24: "The Plague Of The Locust!", with the cover from #21 re-used. Issues #22 and #23 are skipped in the reprint sequence during this issue, and never reprinted during these reprint years. |
1st Story: X-Men Vol 1 #21, June, 1966; "From Whence Comes...Dominus?"
2nd Story: X-Men Vol 1 #24, September, 1966; "The Plague of...the Locust!"