This book was originally issued in 1897 as a slightly edited single volume re-issue of the two-volume "Secret of the Sands or the ‘Water Lily’ and her crew” (1879), the first book by Collingwood.
The story opens with a shipwreck near Weymouth. The hero, Harry Collingwood, rescues the sole survivor from the surf. Before he dies, the survivor tells our hero of a hidden treasure on a Pacific island. Harry commissions the building of what is essentially yacht, and he and his friend Bob set out around the world to find the treasure. The usual Collingwood fare follows, with pirates, gales, the rescue of a damsel in distress. The hero discovers his marooned father, recovers the treasure, and defeats the pirates. Overall it is a great read, and is a splendid example of the Victorian boy's adventure story.