Oh boy, it’s going to take some digging. It’s easy in the US as there’s a journal, Accidents in North American Mountaineering where it’s all fastidiously documented. I’m going to have to email a few people I’ve climbed with who are in the UK that are up on this. Right off hand I’m at a loss so let me see what responses I am able to get.
I think it would be pretty difficult to get anything on an incident like this so long ago. i don’t think having to get help like this reflects badly on Crowley at all afterall he was pioneering at a time when the difficulty, or even feasablity, of many routes was unknown. I’ll ask the SMC if they have anything but I doubt it.