many hours upon the water
Percy Bysshe Shelley was passionately fond of boats. During the previous summer, which he and Mary spent at Marlow near Windsor, he would drift in a small boat on the Thames while he wrote. Mary, Claire, and he had a boat on Lake Geneva during the 1816 summer, in which they sailed out most evenings. Later in the summer Byron and Shelley undertook a two-week excursion by boat around the lake stopping at the various sites of interest reachable from its shores. During this venture Mary Shelley stayed home to look after her infant boy and write.