If it was the 1850s that would make Nigel at least 150 years old. I can vouch for it that unless he is a denizen of the dark, and one who feeds on the warm blood of attractive twenty-year olds, he's no more than 45 (50 max). Mind, my eyesight is not as good as it was so I might be wrong abut that (and I always carry a wooden stake and a silver bullet or two just in case ;-)