CHARACTERS THAT APPEAR IN THIS STORY.
Reading edition
Matt King, concerning whom there has always been a mystery—a lad of splendid athletic abilities, and never-failing nerve, who has won for himself, among the boys of the Western town, the popular name of "Mile-a-minute Matt."
Carl Pretzel, a cheerful and rollicking German lad, who is led by a fortunate accident to hook up with Motor Matt in double harness.
Dick Ferral, a Canadian boy who has served his time in the King's navy, and bobs up in the States where he falls into plots and counterplots, and comes near losing his life.
Archibald Townsend, otherwise "Captain Nemo, Jr.," of the submarine boat Grampus, who proves himself a firm friend of Motor Matt.
Lattimer Jurgens, an unscrupulous person who, for some time, has been at daggers drawn with Archibald Townsend.
Whistler, an able lieutenant of Lat Jurgens.
Cassidy, Burke and Harris, comprising the crew of the Grampus.
"The Man from Cape Town," who does not appear in the story but whose influence is nevertheless made manifest.
McMillan and Holcomb, police officers.