The following day, the five visit the wreck and discover the captain's cabin, where they find some objects belonging to George's great-great-great-grandfather, including an old box which they take back to Kirrin Cottage. The box proves difficult to open, so they throw it from the highest window of the house. The box breaks open, but the noise disturbs Uncle Quentin who confiscates the box. Not willing to give up their quest, Julian sneaks into Uncle Quentin's study and takes the box, which contains an old map of Kirrin Castle. Later in the further investigation on the map, the children find a word INGOTS, which they later understand that it represented the place in which the lost gold was buried. The children realise it is a treasure map showing the location of the lost gold. After making a tracing of the map and returning the box, they decide to find the gold themselves.