20 June 1644 – 26 June 1644

We took horse to see certain natural caves, called Gouttière, near Colombière, where there is a spring within the bowels of the earth, very deep and so excessive cold, that the drops meeting with some lapidescent matter, it converts them into a hard stone, which hangs about it like icicles, having many others in the form of comfitures and sugar plums, as we call them. Near this, we went under the ground almost two furlongs, lighted with candles, to see the source and spring which serves the whole city, by a passage cut through the main rock of freestone.