Robinson's Folly is a high bluff, northeast from the village of Mackinaw, half a mile from the mission house. Soon after the settlement of the modern Mackinaw, Capt. Robinson, of the English army, then commanding this port, had a summer house built on the brow of this bluff, now called Robinson's Folly, for the purpose of enjoying the prospect from that cool and elevated spot. Often he and his brother officers resorted there during the summer days, to while away lonely and tedious hours. Pipes, cigars, and wine, were brought into requisition. No Englishman at that period was without them; in fact, no hospitality or entertainment was complete without them. They were indeed isolated; the nearest white settlements being then Detroit, Green Bay, Saut St. Mary, and Chicago. Communications with these places were not frequent. A few years after, from the action of the elements, the brow of the bluff, where Robinson's Folly stood, was precipitated to the base of the rock, where the fragments can now be seen, which disastrous event gave rise to its name. The "Scull Rock," half a mile or three quarters northwest from the rear of Fort Mackinaw, is chiefly noted for a cavern, which appears to have been a receptacle for human bones, many of which were still to be observed about its mouth a few years ago. The entrance is low and narrow, and seems to promise little to reward the labors of exploration. It is here probably that Alexander Henry was secreted by the chief Wawatam after the horrid massacre of the British garrison at Old Mackinaw. Chimney Rock well repays the trouble of a visit, with the other points of interest on the island. Dousman's Farm, two miles west from the Village of Mackinaw, consists of a section of land; the road to the English or British landing passes through it, also to Scott's or Flinn's Cave, which is on the northwestern portion of the farm. There are three springs of cold delicious water on this farm, two of them are shaded by beech and maple trees. This farm yields yearly from eighty to one hundred tons of hay, besides a large quantity of potatoes and other farm produce.