Sherlock Holmes & The Enlightenment of Newton

Watson is urgently called one evening to attend to a eminent geologist who appears to have been poisoned. His work in Africa is at the behest of Her Majesty's government who are eager to discover and benefit from the mineral wealth of the continent. Other nations are also keen to gather intelligence and foul play is suspected. Watson was given cryptic clues by the dying man and Holmes must now sol...