Sinews of SteelDramaSinews of SteelDramathumb_upthumb_downSinews of SteelApril 4, 1927Directed byFrank O'ConnorSinews of Steel is a 1927 American silent drama film directed by Frank O'Connor.US content warning Last Updated: 7 days ago Request Update CastAlberta VaughnHelen BlakeGaston GlassRobert McNeil Jr.Anders RandolfRobert McNeil Sr.Paul WeigelJan Van Der VetterGreta von RueElsie GrahamNora HaydenMartha JenkinsCharles WellesleyDouglas GrahamJohn H. GardenerElmer PriceRobert GordonThe Office Boy