Poemas Del Rio Wang currently has a post up about an early archive of a half-million photographs of life in Mexico. It was begun by Agustín Víctor Casasola, assisted by his brother. Studiolum says of Agustín,
Since the moment when for the first time a camera fell into his hands (it seems this was in 1902) he did not cease to hunt for images and to reveal the flow of history. In his own words, he became “a slave of the moment”.
A perfect description, he does portray the events as extraordinary moments.
The last pictures he shows are from 1935; they cover a violent period that is well explained by Studiolum. It’s well worth a visit — and don’t miss Tina Modotti’s poem, presented by Francesca in the Comments, nor the music.
A Bad Guide 
I love the playboys. They confirm what those of us who never had what it takes have always hoped is the truth about playboys.
Yeah, I liked the playboys. That was obviously a popular hair style of the moment.
Haunting, chilling post that.
Just above the playboys, the “perpetrators” with their alleged weapons.
And the physiognomic examination.
Arresting and arrested.