After the first charcoal drawing I rubbed it out a bit then drew back into it, still working in charcoal. Improved the composition a little too.
Then I added a bit of oilbar followed by water and then some black ink.
Then I wanted to work on the texture of the stonework so used oil crayons in various colours and some red ink which I used on its own and also mixed with the black ink. Also applied water spray.
On reflection, I think I now need to go in with restrained washes to tie the picture together - aiming for a finish not unlike my Edinburgh Gables. So we'll see what I can do tomorrow.