"The Uffenbach brothers are in the city hall of Amsterdam. Uffenbach describes the three maps of the world in the floor of the large hall (Citizens' Hall]. He also comments on the carillon and its master Cornelis van Dort. Van Dort tells them that the carillon bell founders were the brothers Pieter en François Hemony, and the clock maker Joris Brackel. Van Dort plays them several sonats by Corelli."