It is just so tempting to add all five volumes of Gunther into the Hooke article :-) Guy (JzG)
I don't know much about the publishing history of that work (or indeed the work itself til about five minutes ago) but you could be sitting on a small fortune there: http://www.antiqbook.com/boox/cum/212364.shtml .
Also Gunther Sr died in 1940, so not long til public domain ... you'd better get scanning :)