Inmates shall be employed as provided in ch. 303. Communication shall not be allowed between inmates and any person outside the prison except as prescribed by the prison regulations.
Wis. Stat. § 302.09
The department may be required to justify a refusal to allow a prisoner to write the Veterans Administration concerning the adequacy of his medical treatment. State ex rel. Thomas v. State, 55 Wis. 2d 343, 198 N.W.2d 675 (1972).