"which are frozen into a compact mass" 10 "and later, form the beautiful terraces of the ice-foot" 14 Penguins at the rookery 14 In the foreground a mated pair have begun to build 20 The rookery beginning to fill up 22 "The hens would keep up this peck-pecking hour after hour" 24 An affectionate couple 24 "Side by side ... nests of very big stones and nests of very small stones" 26 On the march to the rookery 28 Part of the line of approaching birds, several miles in length 30 Arriving at the rookery 32, 34 Adélies arriving 36 A cock carrying a stone to his nest 36 Several interesting things are taking place here 38 Three cocks in rivalry 40 Two of the cocks squaring up for battle 40 Hard at it 42 The end of the battle 42 The proposal 44 Cocks fighting for hens 46, 48 Penguin on nest 48 Showing the position of the two eggs 50 An Adélie in "ecstatic" attitude 50 Floods 52 Flooded 54 A nest with stones of mixed sizes 54 "Hour after hour ... they fought again and again" 56 A nest on a rock 58 "One after another, the rest of the party followed him" 58 A joy ride 60 A knot of penguins on the ice-foot 62 An Adélie leaping from the water 64 An Adélie leaping four feet high and ten feet long 66 Jumping on to slippery ice 68 "When they succeeded in pushing one of their number over, all would crane their necks over the edge" 70 Diving flat into shallow water 72, 74, 76, 78 Adélies "porpoising" 78 A perfect dive into deep water 80