J. Edgar Hoover and Clyde Tolson -- the Actual Photos

The new film J. Edgar takes the well-known relationship between long-time FBI Director J. Edgar Hoover (Leonardo diCaprio) and his long-time FBI number-two Clyde Tolson  (Armie Hammer) and develops it into a major theme.   What do we actually know about it?  Hoover and Tolson worked together more than 40 years.  They traveled together on vacation and official business, rode to work together, shared lunch nearly every day at Washington’s Mayflower hotel and sometimes even wore matching suits. 
Hoover, at his death, left Tolson most of his estate. Their relationship, by all appearances, was stable, discreet and long-lasting. But what they did physically behind closed doors, if anything, they kept between them.
Photos like these from the 1930s of Hoover and Tolson together, however, tell a story:

Hoover and Tolson are in the middle, wearing matching suits.

Hoover and Tolson attending a prize fight in New York City. 

Again, Hoover and Tolson stand in the middle, with matching suits and spats.

Hoover sits at his desk, and Tolson stands directly behind him, hand on Hoover's chair.

Hoover and Tolson on vacation.

Tolson and Hoover, as payed by Leonardo DiCaprio (on right) and Armie Hammer (on left).