You can see details of all Jim's books on cycling at his website Star Hill Studio. Click through to the Wheeling Matilda page to listen to some interviews that Jim has given on radio. And if the few references to the racing superstar Major Taylor intrigued you, then follow up the film Tracks of Glory on IMDB.
Jim's talk reminded us of the important principle that you rarely find what you are not looking for. He saw evidence of bicycles in many historical photos that had been extensively studied by others without mentioning them. We need to be aware that a superficial look at a document may not reveal all its information.