http://libraryqxxiqakubqv3dc2bend2koqsndbwox2johfywcatxie26bsad.onion/library/lucy-e-parsons-life-of-albert-r-parsons
The general average age at beginning work is shown to be 15 years and 4 months, the highest average being 17 years and 10 months, and the lowest 14 years and 7 months; the former at San Jose, California, and the latter at Newark, New Jersey.