I'm Curious as to what category this is filed under. Doesn't show up in the 'Index Card' details.
Page 5 lists a number of other ' prince Pippin' tales by the same author, so this story was part of a series of a kind. Tolkien would have been 19 in 1911, so it doesn't stretch reality to think that he might have read these stories and used the names PIPPIN and MERRY as a tribute.
Also, in the notes it states, ' More information on this book at the bottom of the page' but there is none.
Here is a little information on James Henderson and Sons and its worth knowing.
http://ukcomics.wikia.com/wiki/James_Henderson_%26_Sons
They are apparently credited with publishing the first comic in Britain and of publishing ( as a serial) R.L. Stevenson's 'Treasure Island' .
Link to the book:
Young Folk's Tales 198