Horrell, Meredith and Oxley used prisoner data from London’s Wandsworth prison (and other sources) in their study of gender inequality during the Victorian Era. The time period involved includes birth decades from the 1780s to the 1850s. The potential prisoner data selectivity issues might apply here as well, although Horrell et al. (2009) studied this carefully. The original measurements were taken in British feet and inches, and occupations were grouped into five skill categories.