The tentative state of what was known about this part of North America in the 1600s is clearly illustrated in this extract. Sanson's map is one of the first to name and locate 'Erie Lac' and to show it joined to Lake Ontario, as Lac de St Louis has become known. However, the large lake shown in the mountain range to the south and marked as 'Apalache' has never existed, although the name Appalachian in relation to mountain range has survived. The north-south range shown here is quite accurate but the main range running off to the west and across the centre of the map does not exist. Slowly over the next 200 years an accurate picture of the physical geography of this region would be compiled.