Fur Trading (IMAGE) Stanford University Caption From 1710 until 1870, French Canadian voyageurs plied the rivers of western Canada by canoe, trading with the indigenous peoples. Simultaneously, they unintentionally spread tuberculosis. But it was not until the fur traders had ceased their visits in the late 1800s that epidemics began to break out. Credit Drawing originally from Cartouche from William Faden Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.