Melvin Horton Harris is no stranger to the justice system, penal institutions, or state hospitals. He has suffered 11 serious felony convictions. This time a jury convicted him of possessing methamphetamine and marijuana for sale. (Health & Saf. Code, Â§Â§ 11378, 11359.) He was sentenced to state prison for 50 years to life as a "three striker." (Pen. Code, Â§ 667, subd. (e)(2)(A)(ii).) He appeals, alleging that the evidence is insufficient to show possession for sale and that a letter he wrote while in prison was improperly seized. We affirm.