The Mack Sennett's Bathing Beauties group on facebook had this picture from the Smithsonian Institute, which has made many public domain pictures from it's collection available online. A number of Sennett's comedians are depicted including Ben Turpin and Ford Sterling, and Larry Semon ( right ) is about to have his face decorated with a pie.
Perils of Pauline Keystone Cops NPG-9300768B_1
Pauline of Perils fame can be seen to have been put in place of Mabel Normand in BARNEY OLDFIELD'S RACE FOR A LIFE ( below ).
Smithsonian releases public domain images: