UBB.threads

Here's a diagram which will appear in the new edition of Breakout. The initial photo on this post, showing prisoners standing shoulder to shoulder was taken at 3, from the direction shown. The 2 is approximately where Capa stood facing northeast across the road, with the boy's school in the background of his photo-he aimed at a 45 degree angle facing from SW to NE.
The 2 should be more accurately place just above the 3. 1 is a spot where another famous photo was taken, looking into the courtyard behind the church, where scores of prisoners were being held.