Read it through once

From reading Australian books and talking with the people, I became convinced that the aboriginal tracker's performances evince a craft, a penetration, a luminous sagacity, and a minuteness and accuracy of observation in the matter of detective-work not found in nearly so remarkable a degree in any other people, white or colored. In an official account of the blacks of Australia published by the government of Victoria, one reads that the aboriginal not only notices the faint marks left on the bark of a tree by the claws of a climbing opossum, but knows in some way or other whether the marks were made to-day or yesterday.