Bill climbed until the altimeter on the instrument board marked four thousand feet. Then he leveled off and after a slight bank to port, headed the big amphibian due east. Flying conditions were excellent. A light wind blew out of the southeast, but the air was smooth, without a ripple. A cloudless sky of light blue dipped to a sharply defined horizon; and near the rim of the inverted bowl the pale green of the Everglades contrasted with the darker foliage of the cypress swamps. Here and there and everywhere, lakes, lagoons and wandering streams sparkled and danced in the sun glare like uncut brilliants on a bed of green velvet.