Your dad
Military prisoners
there were 1000 prisoners and cells
alcapone and kelly mahace gun,alcatraz
there is no prison so there will be no prisoners
The prisoners of Alcatraz had no complaints in the 1800s because the prison was not established until 1934.
Probably by a head count when mustered in the prison yard. Or a head count by warders going from cell to cell. Bearing in mind how dangerous some of the prisoners were in Alcatraz, I suspect the count was done cell to cell.
312
in 1955
bread and water
336 prisoners
dressed up as guards
100