One of the joys of researching is encountering the unexpected. Case in point is this map, produced in 1863 for the Royal Geographical Society, depicting the travels of John Hanning Speke through Central Africa:
I discovered this map through JSTOR's archive of the Journal of the Royal Geographical Society (Article Link). Attached to a report by Speke on his return to Britain detailing his various encounters and exploits, the map itself was divided into 16 distinct pages. I decided to collate these pages together to produce the map above. Neat, huh?