In Re Nelson

The petitioner claims to be unlawfully imprisoned and restrained of his liberty in the state prison at San Quentin.

He is held in custody in said prison under a judgment of commitment on a sentence of fifteen years for robbery. He was received at the prison on November 1, 1907. The full term of his sentence will not expire until November 1, 1922.

Under section 1588 of the Penal Code, however, it is directed that every convict who shall have conducted himself in conformity to the prison rules and requirements shall have deducted from his term of imprisonment two months in each of the first two…