 Orphan Sally (1922) Actor Actor See fewer |
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 The Marriage Blunder (1920) Actor Actor See fewer |
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 Birthright (1920) Actor Actor See fewer |
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 The Good-Bad Wife (1920) William Carter William Carter See fewer |
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 A Modern Salome (1920) Robert Monti Robert Monti See fewer |
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 The Trap (1919) Bruce Graham - The Broker Husband (as Sydney Mason) Bruce Graham - The Broker Husband (as Sydney Mason) See fewer |
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 The Unbroken Promise (1919) John Corliss John Corliss See fewer |
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 A Fallen Idol (1919) Keith Parrish Keith Parrish See fewer |
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 Bonnie Annie Laurie (1918) Lieutenant Hathaway Lieutenant Hathaway See fewer |
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 The Prussian Cur (1918) Dick Gregory Dick Gregory See fewer |
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 Peg of the Pirates (1918) Terry Terry See fewer |
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 Moral Suicide (1918) Rodman Daniels Rodman Daniels See fewer |
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 The Forbidden Path (1918) Felix Benavente Felix Benavente See fewer |
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 The Painted Madonna (1917) Milton Taylor Milton Taylor See fewer |
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 The Little Terror (1917) George Reynolds George Reynolds See fewer |
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 The Peddler (1917) Sammy Sammy See fewer |
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 Little Miss Nobody (1917) Arthur Wharton Arthur Wharton See fewer |
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 Susan's Gentleman (1917) Tom Neville (as Sydney Mason) Tom Neville (as Sydney Mason) See fewer |
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 The Boy Girl (1917) Bob Ridgeway Bob Ridgeway See fewer |
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 The Honor of Mary Blake (1916) Kirk Hardy Kirk Hardy See fewer |
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 The Daughter of MacGregor (1916) Winston, the Englishman Winston, the Englishman See fewer |
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 Flames of Vengeance (1916) (Short)-Linton Linton See fewer |
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 Feathertop (1916) Ward Roberts Ward Roberts See fewer |
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 I Accuse (1916) Harold Landman (NYDM) (as Sydney Mason) Harold Landman (NYDM) (as Sydney Mason) See fewer |
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 The Dead Alive (1916) William H. Stuyvesant (as Sydney Mason) William H. Stuyvesant (as Sydney Mason) See fewer |
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 The Secret Agent (1916) (Short)-Clark's Assistant Clark's Assistant See fewer |
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 The Ace of Death (1915) (Short)-Steve (as Sydney Mason) Steve (as Sydney Mason) See fewer |
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 The Devil's Darling (1915) (Short)- Actor Actor See fewer |
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 John Glayde's Honor (1915) Undetermined Role Undetermined Role See fewer |
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 Sunshine and Tempest (1915) (Short)-Dave Talbert Dave Talbert See fewer |
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 The Unsuspected Isles (1915) (Short)-Ned Astor Ned Astor See fewer |
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 A Mother's Confession (1915) Actor (as Sidney L. Mason) Actor (as Sidney L. Mason) See fewer |
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 Capital Punishment (1915) (Short)-Jim Armsby Jim Armsby See fewer |
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 The Seven Sisters (1915) Sandorffy (as Sydney Mason) Sandorffy (as Sydney Mason) See fewer |
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| The Vivisectionist (1915) (Short)-The Vivisectionist The Vivisectionist See fewer |
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 The Builder of Bridges (1915) Actor Actor See fewer |
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 Elsie's Uncle (1914) (Short)-Jack Jack See fewer |
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 His Neighbor's Wife (1913) (Short)-Mr. Norton Mr. Norton See fewer |
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 Resurrection (1912) (Short)-Prince Necladov (as Sydney Mason) Prince Necladov (as Sydney Mason) See fewer |
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