Dancing Boxing Match, Montgomery and Stone (1907)
Vaudeville actors Montgomery and Stone appear in this film where they basically hit each other a couple times.
This films only runs for a couple seconds so I'm going to guess that the ending of the picture is currently lost. A lot of these films only ran a minute or less but I've never seen one from this period only last a few seconds. With that in mind it's impossible to fully judge this but I will say it might be a good thing that its not complete because nothing we do see in the few seconds are very funny.
With so many lost films out there, it's hard to imagine people searching vaults for what is missing here.