Relation of the age of Fathers in normal subjects, criminals, and the insane (adapted from Marro).
| Normal. | Criminals. | Murderers. | Sexual Offenders. | Thieves. | Sharpers. | Insane. | |
| per cent. | per cent. | per cent. | per cent. | per cent. | per cent. | per cent. | |
| Period of immaturity | 8.8 | 10.9 | 2.9 | 2.7 | 15.5 | 2.8 | 17.0 |
| "maturity | 66.1 | 56.7 | 44.1 | 66.6 | 57.2 | 60.0 | 47.0 |
| "decadence | 24.9 | 32.2 | 52.9 | 30.5 | 27.1 | 37.1 | 36.0 |
Tattooed criminal from Lombroso’s Uomo Delinquente. A French sailor, a deserter, previously condemned for an unknown crime. The various inscriptions and designs bear witness to his vicious and criminal tastes. The heart’s case, for instance, is common among pæderasts.
The eight heads in this and the following Plate have been chosen, intentionally, almost at random, in order to show the average types of criminal with whom the London police at Scotland Yard have to deal.
1. F. C., age 61. A well-known London burglar; tattooed.
2. C. D., age 31. Housebreaker. “A dangerous character.” Many scars on head, body, and limbs.
3. H. A. G., age 36. “A very clever swindler,” “of gentlemanly appearance, and good address.” Speaks French and German.