This morning I listened to the first disc of The Essential Alan Parsons Project for my Collection Audit project. I still have to write a post about something I noticed in "Snake Eyes" (which I'll reblog here), but first, I figured out the recurring guitar phrase in "(The System of) Doctor Tarr and Professor Fether." As I was listening to it, it sounded pretty easy; the only difficulty (which wasn't even that difficult) was determining that one of the notes is bent.
I doubled-tracked this, mostly because my tone doesn't match that well and I thought double-tracking it would help, but I think it might be that way in the original too.