F.B.I. files on Louise Brooks' friends and colleagues

I suppose it is well known by now that in the past the Federal Bureau of Investigation kept files on thousands of American citizens, including many celebrities. Among those they spied on / investigated / trailed were a few of Louise Brooks' friends and fellow actors. Recently, the F.B.I. released the files on "famous persons" and posted them on the bureau's website. There are files on everyone from Douglas Fairbanks, Jr. and John Wayne to Mary Pickford and Marlene Dietrich. (Apparently, there are no files on Louise Brooks.) These files can make for interesting reading. Here are your tax dollars at work.