This film survives at the EYE = the Amsterdam Film Museum, and can be viewed online through the European Film Gateway. It's a rather silly affair. An young Italian immigrant is targeted by "white slave traders". Even for a silent film the plot and characters don't make much sense. This film was long thought to be from 1921 because that's when it premiered in other countries, but it's in fact from 1917. It was reviewed in the Honolulu Star-Bulletin of November 26, 1917, page 5, and the names and plot match the online video with Marguerite Snow.
There also was a film "The Slave Market" in 1917 starring Pauline Frederick, but that's a different story, involving pirates.
There also was a film "The Slave Market" in 1917 starring Pauline Frederick, but that's a different story, involving pirates.