Keswick Interlude.
These were for sale in grocery stores and outdoor gear shops all over town. I’m told they were the forerunner of all of the varieties of sports energy foods that are available today. I wanted to try one even though my son warned it tasted like a mint-flavored sugar cube. He was right. It’s a giant mint-flavored sugar cube. Probably just what you’d need as your energy flagged two-thirds of the way to the summit.