In 19th-century Russia, prisoners in solitary confinement communicated with each other by knocking lightly on prison walls. Prison architecture responded.

Prison capacity statistics such as rated capacity require careful study for truthful understanding.

A man getting raped in prison has been treated as comedy in the U.S., rather than as a grave injustice.

About 230,000 adults per year experience sexual victimization while held as inmates in U.S. police lockups, jails, and prisons.

Both writing and receiving letters were limited to no more than one letter every three months in Pentonville Model Prison in Britain in 1855.

From 1929 to 1955, international standards for communication with prisoners shifted reference from “respectable” friends to “reputable” friends.

The prisoner population of Mississippi State Penitentiary at Parchman in 1909 was about 90% black men.

A young boy in the 1970s felt that the guy should have refused to take the letter to Garcia.

Penal reforms that popular Arizona Governor Hunt championed probably helped to change prisoner-mail policies in New York State and other states.

Sanders’ important work on prisoners’ mail attracted some references in a variety of publications.