The Friends of Fort Knox announced that they are sponsoring a granite-cutting demonstration by experienced granite cutter, Shawn Costigan, Saturday, Aug. 20, from 10 a.m. to 4 p.m., adjacent to the Fort Visitor Center.

Fort Knox, comprised of vast amounts of hand-hewn granite, was constructed between 1844 and 1869. Costigan will demonstrate some of the techniques that granite cutters would have used during the fort’s construction period.

On Saturday, Aug. 27, ghost tours of Fort Knox will be lead by members of the East Coast Ghost Trackers, who will lead guests through the Fort and use some of their paranormal investigating equipment.

Tours will take place at 8, 9 and 10 p.m., at a cost of $10 per person. Fort Knox was featured on the SyFy TV Channel’s “Ghost Hunter” program last April, in which one of the investigators said “there is some serious activity going on there [at Fort Knox].” Tickets for the ghost tours may be purchased in advance at the Friends’ gift shop or by telephoning 469-6553.

The Friends of Fort Knox work in partnership with the Maine Department of Conservation’s Bureau of Parks and Lands. The Friends’ mission is to restore the Fort and enhance its educational, cultural and economic value for the people of Maine.