All from the Toronto Star.
Published obituaries in the wake of Mark’s death said roughly the same things. The two that follow are representative.
In the Toronto Sun (1994.09.12).
(I found this article only on 2015.06.03; posted here the next day, despite the datestamp.)
The late Rick Bébout, a writer for The Body Politic and Xtra, spent years during the early commercial era of the Web writing down his own tales, experiences, and reminiscences about being gay in Toronto. This 1993 posting (copy-edited here) describes a surprise(d) encounter with Mark.
I wrote a few short pieces about Mark Leduc for the Village Voice, which had a simply amazing sports section in the 1990s.