His Sister's Kids is a 1913 movie starring Roscoe Arbuckle and Minta Durfee.
Roscoe 'Fatty' Arbuckle
as Dr. J. Jacobs
Minta Durfee
as The Doctor's Sister
Ford Sterling
as The Police Chief
Gordon Griffith
as 2nd Nephew
Charles Avery
as Man with Cane
Virginia Kirtley
as Onlooker
Hank Mann
as Cop
Rube Miller
as Old Man
Al St. John
as Cop
Jack White
as 1st Nephew