Dr. Mahoney of York University has located horse dung on the Col de la Traversette, in the French Alps. This has led to a new debate as to which route Hannibal took to cross the Alps with an army of 30,000 men and 37 elephants.
You can follow this in more detail if you go to this blogspot. It includes the chart comparing possible routes in the postlude to my book: "Alpine Elephant".