* The title is incorrect: There might be a slight error in the title, year, or spelling.
* It's a lesser-known film: It could be a very obscure film that wasn't widely released or documented.
* It's a non-fiction film: The title might refer to a documentary or short film that isn't typically tracked by major film databases.
To help me find the film you are looking for, can you please provide any additional details you might have, such as:
* The plot of the film: What was the movie about?
* Any other actors you remember: Did you see other actors in the film besides Percy Ponsonby?
* The genre: Was it a comedy, drama, musical, or something else?
With more information, I might be able to locate the movie and provide you with the cast list.