The truth is, silent films ran at whatever speed the projectionist set on the projector, which required balancing artistic intent, comic effect, excitement, realism, catching up to your schedule after repairing a film break, cramming more shows in an evening because you sell a lot of tickets for a Mary Pickford film, and ending the evening earlier when the projectionist has a hot date (and there is historic evidence for all of those reasons being used). The filming speed varied as well, so that in films like
The Four Horsemen of the Apocalypse the tango sequence runs much faster than the rest of the film, and some projectionists like to slow it down. Others feel that maybe the filmmaker meant it that way.
So, any list claiming to have THE speed for certain silent films would be incomplete and misleading, though certainly historical evidence for film speeds used at certain theaters would be worth finding and evaluating.
There's a useful article by Kevin Brownlow
here, but if you read the details, you'll note that he only guessed at the actual filming speed based on a subjective estimate of what they felt looked natural. Sometimes you'll come across historic directions on original cue sheets and scores to run certain films at certain speeds, or even to change speeds during the run of the film, but rarely are these instructions traceable back to the film-makers -- largely these decisions were made by musicians and theater operators in New York City, based on what
they felt was right for the film.
To be honest, as long as you get it close, few will notice much or care (other than the musicians, if they're playing from a score designed to be played at a particular speed). Even in video releases you'll find wide discrepancies, for instance the Kino and Image "Mark of Zorro" were transferred at 24 fps, the Flicker Alley release at 20 fps. Very few critics seemed to notice.
So, decide what looks right to you. For films earlier than 1918 I'd start with 18 fps, and adjust from there. From 1918-1920 I'd try 20 fps, for 1921-1923 I'd try 22 fps, and by 1924 I'd try 24 fps. If you're presenting a show, talk to the projectionist and musicians about what's best or possible. By 1927, if a soundtrack was added to a film, it was run at 24 fps by necessity, but that doesn't necessarily mean it's the best speed.
There are some big exceptions --
The Italian Straw Hat, from 1928, is way too fast at 24 fps,
The General is often shown at 25 or 26 fps and works fine, some late Griffith Biographs want to be
really slow since he was trying to cram a lot of plot into one or two reels, and you can find certain films that are intolerable at any speed.