To review and consolidate the Wrightson stories I've listed into a clear chronology:
HOUSE OF MYSTERY 179, "The Man Who Murdered Himself", 3 pages, March-April 1969.
Wrightson's first published story, for DC.
THE SPECTRE 9, "Abraca-doom", 9 pages, April 1969.
Wrightson's 2nd story for DC.
HOUSE OF MYSTERY 180, "Scared to Life", 3 pages, May-June 1969.
Wrightson's 3rd published story for DC.
SHOWCASE 83 "Nightmaster" part 2 (of 3), May-June 1969, 23 pages.
Wrightson's 4th story for DC
WITCHING HOUR 3, June-July 1969, "In A Far-Off Land", , 8 pages.
Wrightson's 5th story published by DC.
HOUSE OF MYSTERY 181, July-August 1969. "The Siren of Satan", 10 pages.
Wrightson's 6th story for DC.
SHOWCASE 84 "Nightmaster" part 3 (of 3), July-Aug 1969, 23 pages.
Wrightson's 7th story for DC.
WITCHING HOUR 5, October 1969, "The Sole Survivor" , 7 pages.
Wrightson's 8th story for DC.
HOUSE OF MYSTERY 183, "The Dead Can Kill", 3 pages, Dec 1969.
Wrightson's 9th story for DC.
WEB OF HORROR 1, Dec 1969 "The Game that Plays You", 6-pages.
Wrightson's 10th published mainstream story.
UNEXPECTED 116, Jan 1970, "Ball of String", 2-pages.
Wrightson's 11th published mainstream story.
WEB OF HORROR 2, Feb 1970, two Wrightson stories:
"Mother Toad", 5 pages.
and
"Breathless", 7 pages.
Wrightson's 12th published mainstream work.
WEB OF HORROR 3, April 1970, "Feed It", 6-pages.
Wrightson's 13th published mainstream work.
HOUSE OF MYSTERY 186, May-June 1970, "Secret of the Egyptian Cat", 10-pages.
(Complete issue, including second story and cover by Neal Adams, and even ads!)
Wrightson's 14th published mainstream story.
UNEXPECTED 119, "Mirror, Mirror...", 8 pages, July 1970.
Wrightson's 15th published story.
HOUSE OF MYSTERY 188, "House of Madness", 8 pages, Oct 1970.
Wrightson's 16th published story.
Some stories I previously skipped, since they (the ones not linked) are not printed in their entirety online to read.
