Dear people: John Bartlett inquired (2024.02.28 MMDigest) about the
whereabouts of Terry Smythe's web pages about player piano rolls,
in particular about his archive of roll scans as MIDI files. It does
appear that by 2024 the web page has gone the way of all things.

However, at least for now, the Internet Archive's Wayback Machine
allows one to get at captures of the web page as it was. For example,
the roll scan archive page seems to last have been captured when it
was up in 2022, as in

https://web.archive.org/web/20210728163418/http://terrysmythe.ca/archive.htm 

John's recollection of Terry having A-roll scans up is correct. 
210 scans are found there, and about 6700 standard 88-note roll scans,
plus large numbers of reproducing roll scans of different kinds.

In the context of the recent discussion about a real-time roll player
based on simple discrete millimeter-scale light-sensing elements, this
of course was the basis of Lee Roan's A-roll scanner of the late 1990s
in Temple City, California. Being based on very ancient computers
indeed, it was decidedly not portable, but it worked just the same way.
See the photo (I think I took it, actually) at

https://web.archive.org/web/20210701000000*/http://terrysmythe.ca/scanners.htm 

It would be good to hear from Terry Smythe; his warm support of roll
scanning efforts since the early days of the late Richard Stibbons's
pioneering work was crucial in the promulgation of that technology and
the subsequent very large number of roll scans that have been done.

Best regards,
Bob Pinsker
San Diego, California