NV, MT:
So you've got the "book bug" too! Yes, Quatermain figured in "King Solomon's Mines" and a couple of others, too. As I recall, his favorite "piece" was a Purdy(?) "cape gun" (popular in South Africa, and named after the Cape of Good Hope), a side-by-side with one barrel for shot and the other rifled.
The novels don't "read" as well today as they did to me sixty years back, either, but are still a bit of fun. I think they are available in those inexpensive "three books bound as one" special editions, usually available used for $1.00 or so; check at AbeBooks.
Doug