Give me a list of films in which Walter Whitman appeared while he was under the age of 60.

Context: Walter K. Whitman was an American character actor of the stage and screen who was active during Hollywood's silent era. He is not to be confused with the influential poet of the same name.

Whitman had a long career on the stage in cities like New York, Boston, and Chicago before he began appearing in Triangle films in the 1910s, at which point he was already an older man. He died on March 27, 1928, in Santa Monica, California.

"I was only a country lad, but I had seen so many real good shows at our local opera house that I made up my mind I would be an actor," he'd later tell reporters of his beginnings. He also recounted that in 1896, he leapt from the fifth floor of the Hotel Richelieu in Montreal when it caught on fire.

Selected filmography
Missing Daughters 
Long Live the King 
The Grub-Stake 
The Love Letter 
Wasted Lives 
Hearts Aflame 
A Question of Honor 
The Fire Bride 
The Girl from Rocky Point 
The New Disciple 
The Mysterious Rider 
His Nibs 
The Girl from God's Country 
The Three Musketeers 
The Home Stretch 
The Mark of Zorro 
Darling Mine 
Passion's Playground 
Dangerous Hours 
John Petticoats 
When Bearcat Went Dry 
Pretty Smooth 
Destiny 
The Cry of the Weak 
Whom the Gods Would Destroy 
The Heart of Humanity 
Desert Law 
Daughter Angele 
They're Off 
The Price of Applause 
False Ambition 
Everywoman's Husband 
His Enemy, the Law 
The Last Rebel 
Old Hartwell's Cub 
Captain of His Soul 
The Hopper 
Without Honor 
The Regenerates 
The Firefly of Tough Luck 
The Tar Heel Warrior 
Polly Ann 
Wee Lady Betty 
The Girl, Glory 
The Millionaire Vagrant 
The Desert Man 
Paddy O'Hara 
The Boss of the Lazy Y 
The Dark Road 
The Last of the Ingrams 
Princess of the Dark 
The Sin Ye Do 
The Criminal 
The Honorable Algy 
The Three Musketeers 
The Mating 

Answer: Walter Whitman, an American actor in silent films, was born in 1859, so he was age 60 in 1919. Here is a list of the films he appeared in before 1919:

The Heart of Humanity (1918)
Desert Law (1918)
Daughter Angele (1918)
They're Off (1918)
The Price of Applause (1918)
False Ambition (1918)
Everywoman's Husband (1918)
His Enemy, the Law (1918)
The Last Rebel (1918)
Old Hartwell's Cub (1918)
Captain of His Soul (1918)
The Hopper (1918)
Without Honor (1918)
The Regenerates (1917)
The Firefly of Tough Luck (1917)
The Tar Heel Warrior (1917)
Polly Ann (1917)
Wee Lady Betty (1917)
The Girl, Glory (1917)
The Millionaire Vagrant (1917)
The Desert Man (1917)
Paddy O'Hara (1917)
The Boss of the Lazy Y (1917)
The Dark Road (1917)
The Last of the Ingrams (1917)
Princess of the Dark (1917)
The Sin Ye Do (1916)
The Criminal (1916)
The Honorable Algy (1916)
The Three Musketeers (1916)
The Mating (1915)