I started the book The Lost City of Z by David Grann today.
I've only gotten about 30 pages into it so far so I'll reserve my initial thoughts until I've given it a fair shot. However, I did read the story about the orgination of the line "Mr. Livingstone I presume?" and found myself immediately familiar with the line but in no way familiar with why I knew it?? I sat for a second and then realized it came from a solid childhood source.