A Day's Elephant Hunting in Essex. 39 Bison, or Auroch .. .. .. .. Bison prisma. Urus.. .. .. .. .. .. Bos primigenius. Brown Bear .. .. .. .. Ursus arctos. Grisly Bear.. .. .. .. .. Ursus ferox. Wolf.. .. .. .... .. Canis lupus. Fox .. .. .. .. .. .. Canis vulpes. Lion.. .. .. .. .. .. Felis leo. Beaver .. .. .. .. .. Castor fiber. Water-rat .. .. .. .. .. Arvicola amphibia. Such is the catalogue of animals which have been disinterred during a series of years from these ancient graves at Ilford. What startling questions they raise ! What was the climate and what were the surroundings of this their native land—of these now strangely altered landscapes of Essex and South Eastern England, where the hills and vales are now vocal with domestic sheep and oxen, and where only the badger, the beaver, and the otter are left as the largest of the fera naturae of these bygone times ? Some of the species found fossil at Ilford still inhabit these islands; others, like the brown bear and the wolf, have lived here in historic times; the fossil bison or auroch of the Essex and Middlesex prairie is hardly distinguishable from the American buffalo of to-day. But what of the stranger forms which figure on the list? What of the northern fleece-clad elephant, the woolly rhinoceros, now vanished from the earth; what of the hippopotamus, the southern elephant, and the lion, which are shown to us to-day only as the captive exotics of the menagerie? How shall we assign to animals of such opposite regions and climes a common area of habitation? Did these creatures really roam wild in natal landscapes in this valley of the Thames? Did they live, move, and have their being amid scenes as orderly as the cosmos of to-day, or shall we assign them, as was done by their earlier discoverers, to a world of confusion and chaos, to the shadowy and horrific Kingdom of Diluvia and Catastrophe? Our first task, then, is this : To find in the Essex of to-day some traces of former climatal and geographical conditions under which these animals could have lived.