Which of the following quotations most clearly indicates that a substantial amount of time passes between the end of chapter two and the beginning of chapter three?
"His sandy hair, considerably longer than it had been when they dropped in, was lighter now; and his bare back was a mass of dark freckles and peeling sunburn."
"Jack was bent double. He was down like a sprinter, his nose only a few inches from the humid earth. The tree trunks and the creepers that festooned them lost themselves in a green dusk thirty feet above him, and all about was the undergrowth."
"At length he let out his breath in a long sigh and opened his eyes. They were bright blue, eyes that in this frustration seemed bolting and nearly mad. He passed his tongue across dry lips and scanned the uncommunicative forest. Then again he stole forward and cast this way and that over the ground."
"The silence of the forest was more oppressive than the heat, and at this hour of the day there was not even the whine of insects. Only when Jack himself roused a gaudy bird from a primitive nest of sticks was the silence shattered and echoes set ringing by a harsh cry that seemed to come out of the abyss of ages."
"Jack stood there, streaming with sweat, streaked with brown earth, stained by all the vicissitudes of a day's hunting. Swearing, he turned off the trail and pushed his way through until the forest opened a little and instead of bald trunks supporting a dark roof there were light grey trunks and crowns of feathery palm."