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"There were five of us that night [at the seance]: Jessica, whom I was to marry just after the new year, Walters, and two of our new members, one a student -- Cambridge, I think -- named Wilson, who was home for the holiday, and a young scientist of sorts named Tice."

From "The Cellar Room", by Steffan B. Aletti

I survive the seance in the flashback, but die unmourned offscreen in the intervening years before the framing story concludes.

I spotted it in Acolytes of Cthulhu, but it traces back at least as far as Weird Terror Tales #3, Fall 1970.