YOU'VE GOT IT FRYBABE
King Solomon's Mines was published in 1885 and Wikipedia tells that 'it is the first English fictional adventure novel set in Africa and is considered to be the genesis of the 'Lost World' literary genre.
Haggard wrote the novel as a result of a wager with his brother, namely, whether he could write a novel half as good as R.L Stevenson's 'Treasure Island' ...
The book became the year's best seller, the only problem was how to print copies fast enough.
The novel has been adapted to film at least six times - I think I only ever saw two- the Stewart Grainger and the Richard Chamberlain versions.
The author was Sir Henry Rider Haggard. - he was knighted in 1912 as Knight Bachelor and then Knight Commander in 1919 - he died in 1925.
Thanks for participating everyone - it was fun - in the end every letter on the table made it obvious in one way or another.