Hello, Really enjoyed your photos of Bert and I have been saving material of him and his sales material for years. I need to gather some of it up and scan to you if you wish. Did not know your school had this material. His estate was broken up years ago and thinking it was all in the wind. The American circus was able to take products all over the country where people could see them first hand. Everything from National cash registers to cars and trucks. Best regards, pj holmes