''A Very Remarkable Sickness'': Epidemics in the Petit Nord, 1670-1846 by historical geographer Paul Hackett meticulously traces the diffusion of acute, directly transmitted infectious diseases from Europe through central Canada to the West. Significant trading gatherings at Sault Ste. Marie, the trade carried throughout the Petit Nord by Hudson Bay Company ships, and the travel nexus at the Red River Settlement, all provided prime breeding ground for the introduction, incubation and transmission of acute diseases such as smallpox, influenza, and measles. Hackett’s analysis of evidence in fur-trade journals and oral history, combined with his study of the diffusion behaviour and characteristics of specific diseases, yields a comprehensive picture of where, when, and how the staggering impact of these epidemics was felt. Although new diseases had first arrived in the New World in the 16th century, by the end of the 17th century shorter transoceanic travel time meant that a far greater number of diseases survived the journey from Europe and were still able to infect new communities resulting in a monumental loss of life and would forever transform North American First Nations communities. Paul Hacket has a PhD in geography from the University of Manitoba, and is Assistant Professor in the department of Community Health Sciences.