A part-time gravedigger from 100 years ago (no doubt with a thick back-country accent) sounds like the companion we never knew we wanted. And of course, travelling with the Doctor, his gravedigging skills would find a whole lot of use...

The choice of 'castrated' reminds me of a quotation I saw from a review by Dorothy L Sayers where she said something like "If the author can't find the right word, anything approximate will do."