38 Mr. Henry Walker's Lecture: II. THE MAMMOTH AND HIS COMPANIONS AT HOME. "Stay, you imperfect speakers, tell me more." Macbeth, Act I., Scene iii. The curious and heterogeneous assemblage of fossil animals found lying together in one common grave in the Valley of the Roding at Ilford might well perplex and bewilder the beholder. Here on the slope of a little tributary to the Thames, within sight of tall chimney- stacks and railways, and within sound of the roar of the million-peopled city, lie side by side the strangely-mingled remains of wild, uncouth creatures of other climates and unknown times. Some of them evidently belong to an obsolete world. Year by year the number has been enriched by fresh discoveries, and even now the mysterious collection may be incomplete. But it is time we turned our attention to the problems these remains suggest. How shall we begin the enquiries they force upon us? We shall do well in the first place to look a little more closely at the list of the animals them- selves, and see into what groups they may possibly be resolved. The following are the species which have so far been identified and named by our palaeontologists :— Mammoth, or Great Hairy Elephant .. Elephas primigenius. Southern Elephant (straight-tusked) .. Elephas antiquus. Rhinoceros (fleece-clad, two-horned, stout-limbed) .. .. .. .. Rhinoceros tichorhinus. Rhinoceros (small-nosed, one-horned, slender-limbed) .. .. .. Rhinoceros leptorhinus. Rhinoceros (big-nosed, two-horned, slender-limbed) .. .. .. Rhinoceros megarhinus. Great Hippopotamus .. .. .. Hippopotamus major. Wild Horse .. .. .. .. Equus caballus. Irish Elk .. .. .. .. .. Megaceros Hibernicus. Stag .. .. .. .. .. .. Cervus elaphus. Roe .. .. .. .. .. .. Cervus capreolus.