Bert was at Hull University on a Friday night gig not long after the Watersons turned professional and handed over the running of the club to a committee.

He seemed pissed or drugged up or both.

He inarticulate, he mumbled and struggled to play the guitar and sing at the same time. That's why he wasn't booked.

He didn't play the sort of music those who ran the club liked anyway.
They didn't book Alex Campbell for much the same reasons. They didn't mind drunks, but they expected to them to be able to perform.

There was a club in the same venue that ran on a Thursday night with a booking policy that would have encompassed Bert and they didn't book him either. There was a club not far away that ran on a Friday night and they didn't book him either.

And there was a circuit of folk clubs around Hull and across the water in the Grimsby area and I doubt he played many of them either.

So your point was?