User blog comment:D2r/Unanswered Questions of Redwall/@comment-1427879-20101206165721

For 7), it's probably along the lines that some of the treasure is useful, others you can trade.

Lots of questions can be answered by the simple fact that BJ hadn't completely planned out his world in Redwall.

For 18a He would have a "human-proportioned cart" simply because he could fit a lot of rats into such a cart. It was probably more along the lines of a big cart.