So, Marcus L. Rowland has cropped up three times on my #HTTRPG timeline so far, never with a full-on, no-asterisks HTT adventure but with some interesting patterns.
In 1983, I flag one of his adventure seeds (in White Dwarf) as "HTT mainly by virtue of being just a seed, rather than any kind of design commitment."
In 1990 I find myself flagging another seed with the exact same note, but THIS time he also includes some playtest notes, and he was clearly something of an HTT Game Master. 😅