Atalanta had reached the middle of the channel now and, freed from the slow horse-barges, spread more canvas to the wind than she had done before. They were sailing due east on Gravesend Reach. On their right, the chalky hills would draw back from the river, widening the marshes that spread at their feet. The town of Tilbury was on the left. It was the last port on that bank of the river, for beyond it the Thames sloshed between mud-flats instead of streaming between proper banks. Even at their improved pace, they had a few hours’ sail ahead of them; and Isaac was nowhere to be seen. There was no harm, Daniel concluded, in conversing with a philosophy-hobbyist.