Hi Diane,
About “Dead Seal”. It’s been up for a long time, (16 years), and I’m absolutely sure the first pitch belay bolts were never intended as a lower off. Possibly the way to look at it is to consider “Dead Seal” to be a two pitch climb, as it was originally put up. What some people do, is put an abseil line in about the middle of the slabs, further up, use it all day and one person takes it down at the end of the climbing session. We often do the same at Cuthbert.
Cheers,
Toc.