Horacio appeared for the first time in over a week today. I have given him a good long 'soak' and am trying to put a hibernation plan into action.
I think one of the difficulties about keeping a tortoise is that everyone does something slightly different - you become like a neurotic parent trying to do the best for your tortoise but you never quite know exactly what is best.
So glad he appeared though, before he goes down for the winter.
Thank you for all your advice.