Three new souls got.

First up, Tombstone. I got over 10,000 experience points from killing them before one gave up a soul. As they only give out 48 points per kill, you can work out how many I had to dispose of. Took forever. I was playing by sound alone while watching TV for a good proportion of it.

Run left, wait to hear Tombstone noise, attack, turn around and head right, wait to hear door opening noise, turn left. Repeat. For ever.

After that, I just went for a run across the castle. Took some time out to get a Yorick soul, but that dropped quite quickly.

Then went and got one of the secret creature souls. Pretty easy, actually. The newspapers told me what to do and using a couple of souls I managed to trap and kill him. Soul dropped on about the tenth kill. Somewhere around there.

But none of those souls seem to have given me anything that will get me past spikes.