Hi Grampy1, in answer to your question about what type of prison it was, Woking Invalid Convict Prison was the first purpose built, permanent prison was mentally and physically disabled prisoners. It was typically a dumping ground for those who acquired disability or illnesses whilst serving their sentences elsewhere. Woking had up to date facilities, trained medical staff and could manage a whole host of maladies which other prisons could not.
Regarding Guest, I will be researching him in future and i'll be sure to let you know when I do.