Albert Bigelow Paine,
The Boys' Life of Mark Twain — Chapter 39
(1916)
“ Mark is a queer fellow. There is nothing so delights him as a swift, strong stream. You can hardly get him to leave one when once he is in the influence of its fascinations. To throw in stones and sticks seems to afford him rapture. Twichell goes on to tell how he threw some driftwood into a racing torrent and how Mark went running down-stream after it, waving and shouting in a sort of mad ecstasy. ”
