A fishing contest at The Trading Post, Mr. Hollister’s sporting goods store, has everybody in Shoreham excited. After Pete catches a large fish with a mysterious tag on its tail, another adventure begins for the eager young detectives.
Mr. Hollister plans a trip to New Mexico to purchase SW Indian trinkets to sell at The Trading Post. When family friend and Yumatan Indian Indy Roades tells them of his tribe’s lost turquoise mine, Mr. Hollister brings the whole family along to help locate the lost gems.
A missing letter is the key to the whereabouts of Fort Freedom, the stockade that disappeared after the Revolutionary War. The fort is located somewhere within the boundaries of Shoreham and has been sought after for many years, not only for its historic value but for the gold supposed to be hidden there by the early settlers.
Mr. Hollister’s sporting goods and toy store, The Trading Post, is robbed, but the only things taken are a Geiger counter and some axes. His new invention, an inflatable canoe, is left untouched. The family leaves the matter to the police and heads to a nearby forest for a camping trip and test run of the canoe.
It was a small note—written in German. Pete Hollister found it hidden in the door of a broken cuckoo clock. When the note was translated, the Hollister children were jubilant. The message was a riddle that made little sense to them—but it was the first clue in a brand-new mystery.