Excited by all the sights, young Rollo emerges from the British Museum with his uncle, Mr. George -- who then grants the boy a bit of freedom to wander on his own! Rollo enjoys his pleasant sight-seeing. When he thinks about taking a cab to their Northumberland Court lodgings, he reaches into his pockets -- which are empty! He forgot his coin purse, this morning . . . and Northumberland Court is miles away! Rollo finds himself alone, in big, bustling London -- and where to turn? Rollo in London continues the adventures of plucky Rollo Holiday, traveling abroad with his family.