At the luncheon, Rommel teases his guests, allowing them to ask him twenty questions about his future plans. Bramble listens with interest. From the conversation and later remarks by Rommel, he eventually deduces that the field marshal, disguised as an archeologist before the war, had secretly prepared five hidden supply dumps, the "Five Graves to Cairo", for the conquest of Egypt. The final piece of the puzzle (their locations) falls into place when Bramble realizes that Rommel's cryptic references to points Y, P, and T refer to the precise locations of the letters of the word "Egypt" printed on his map.