Impressions made by the feet of persons, or their shoes, boots, or other covering for the feet, on the ground, snow, or other surface. In the same category are also impressions of shoe- nails, patches, abrasions, or other peculiar- ities therein. When found at or near the scene of a crime they often lead to the identification of guilty parties. "The presumption founded on these cir- cumstances has been appealed to by man- kind in all ages, and in inquiries of every kind, and it is so obviously the dictate of reason, if not of instinct, that it would be superfluous to dwell upon its importance." Will, Circ. Ev. 194. It is said that evidence of footprints and their correspondence with defendant's feet may be proved even when his agency is disputed, not as alone con- vincing, or indeed, available, but as tend- ing to establish a case; Whart. Cr. Ev. §795; even where the defendant's proof tended to establish an alibi; 25 S. W. Rep. (Tex.) 629. Evidence of footprints alone has been held insufficient to convict; 1 F. & F. 354; 19 Ia. 230; 17 Fla. 669; and unless the measurement is careful and ac- curate, or there is some peculiarity shown. the probative force is slight; 31 Fla. 240: 3 N. Y. Crim. Rep. 406; 57 Ga. 482; 89 Mo. 168; but in many cases such peculiarities have been shown and evidence of the foot- prints admitted; 8 Tex. Cr. App. 30; 117 III. 271; 59 Ga. 738; 17 Kan. 458; 10 Crim. L. Mag. 890; but a conviction on such evidence will be reversed for refusal to admit proof for the defendant that he has never worn a shoe which would make such a print; 12 Tex. Crim. App. 219; the discovery and comparison should be prompt with relation to the crime; 53 Ga. 253; and the measure- ment should be accurate; 12 Tex Crim. App. 219; 8 id. 332; though it need not be immediate, the question of time going to the weight of the evidence, not to its com- petency; 68 Cal. 576. The identification of such tracks is a matter of common observation, which does not require expert testimony; 63 N. Y. 590; 68 Ala. 569; 84 N. C. 756; and only the peculiarity of the tracks and the facts of identification may be proved, but not the opinion of the witness whether they were made by the defendant; 7 Neb. 320; 88 Ala. 193; 98 id. 10; but a witness has been permitted to prove the measurement of the tracks and their exact correspondence with the shoe of the defendant; 30 Tex. App. 482; the examination and the comparison need not be made in the presence of the defendant; 84 N. C. 756; nor can he be compelled to put his foot in the track to make evidence against himself; 63 Ga. 667; but where he was compelled to do so the evidence was admitted; 74 N. C. 646; and tracks have been voluntarily made by the accused before the jury for comparison with those proved; 80 Ga. 269. Comparison of the shoes with the footmarks should be made before the former are put in the marks; 1 Lew. C. C. 116; and where this was not done the evidence on the subject was rejected; id. Such evidence, even if established beyond doubt, is liable, as in all cases of circum- stantial evidence, to be the subject of fabrication, or erroneous inference; see the case of Mayenc, Gabriel 403, where the shoes of another person were put on by one committing a crime; and the celebrated case of Thornton, fully reported in Will, Circ. Ev. 286, where an alibi was success- fully proved after apparently conclusive circumstantial evidence, including foot- prints. Proof may be made by horse-tracks cor- responding with those made by a horse of defendant; 82 Tex. Crim. App. 112; or that shoes taken from such horse fitted the tracks: 23 Ala. 44; and when the prisoner