The best-known beach on the island was called Sand Beach, and the sand was made of thousands, or maybe millions, of pulverized shells, including mussels, which gave it a lavender shade. It amazed me then and amazes me now that an entire beach could be made of shells. The sand was more comfortable for lounging on than the rocky beaches of the island, and it was sheltered from the wind in a cove. But the water was about 55 degrees, even in the height of summer, making it shocking to jump into and swim in. Not that it stopped us.