If we're calling this site a gallery of unknowns, then what's he doing here? Granted. He doesn't fit with the rest. But he's unknown today. Who remembers the great Gilbert, unless you're a student of the era?
"Can a man look so sober and mean iit - with cash in his hand an hte world at his feet? We suspect this isn't one of Jack's habitual expressions - the photographer just had to think up a new pose."
That's honest enough. He was a famous lush. Wikipedia:
Gilbert's popularity began to wane when silent pictures gave way to talkies. Though Gilbert was often cited as one of the high-profile examples of an actor who was unsuccessful in making the transition to talkies, his decline as a star had far more to do with studio politics and money than with the sound of his screen voice, which was rich and distinctive.