"Staring at the comet could not see it moving but if I took my eyes away for a short moment and then viewed again, the comet had moved."
How long was your 'short moment'? Moved compared to what?
Since you were observing with a early C-8 the apparent positional shift could have been attributed to the telescope's spur gear drive which allowed an image to oscillate back and forth within the field of view over a relatively short period of time (don't now recall the actual period).
The only way you could have known for sure would have been to note a comet's position relative to background stars and watch for movement, not judged by the position in the field of view in a typical C-8 of that period.
In those days, C-8 spur gear drives were notoriously frustrating for photographers who were required to continuously adjust a variable speed drive's frequency to keep an object centered on a guide scope's cross hair. Ask me how I know.
Edited by Richard O'Neill, 28 July 2021 - 06:25 PM.