Bag Carried on the Back of a Traveller
Puzzle 11 of Sherlock Holmes Hard Pack
Question is: Bag Carried on the Back of a Traveller
and the answer is: BACKPACK
Word Meaning:
BACKPACK — A knapsack, sometimes mounted on a light frame, but always supported by straps, worn on a person’s back for the purpose of carrying things, especially when hiking, or on a student's back when carrying books.
Definitions from Wiktionary.