Acting
*** FYI: NOT TO BE CONFUSED WITH ACTOR BILLY GILBERT (born William Gilbert Barron) WHO LIVED FROM 1894 TO 1971. ***
Billy Gilbert (born William V. Campbell; September 15, 1891—April 29, 1961) was involved in more than 150 American films between 1913 and 1936, working as either an actor, extra, or director. Gilbert spent his entire career working almost exclusively in shorts, often uncredited.
[biography (excerpted) from Wikipedia]

Give Us This Night
as Leader of Clacque
Never the Twins Shall Meet
as Mr. Clark

The Rodeo
as Minor Role (uncredited)
The Bees' Buzz
as Country Club Drinker, Farmer

Noisy Neighbors
as Third Son

Smith's Army Life
as Officer

Motorboat Mamas
as Boat Officer

The Campus Carmen
as Horse Doctor
Movie Mania
as Tim Murphy

Fiddlesticks
as Bystander
His Trysting Places
1914