[coroxout]

So it is - you need to search the Macintosh section rather than the HyperCard section. Thanks!

Two other Rand and Robyn Miller titles are there too: https://archive.org/details/TheManholeMacintosh https://archive.org/details/CosmicOsmoMacintosh https://archive.org/details/SpelunxMacintosh

I never had a Mac in that era but I'm looking forward to trying these after reading the Digital Antiquarian article about the Manhole: http://www.filfre.net/2016/10/the-manhole/

The HyperCard stack I was really interested in seeing after all these years, though, was the Mackerel Stack - alas, not there (yet)... http://www.craphound.com/nonfic/mackerel.html