Clifford became an extra/bit player in sound films, notably for John Ford, who, she admitted, usually brought her along more for her bridge-playing skills (they were both fanatics) than for any other reason and you usually had to look long and hard for a glimpse of her.
Ruth actually had a bigger role in the 1941 Tim Holt oater ALONG THE RIO GRANDE. She plays the hostess of a below-the-border dive where she not only keeps pretty songstress Betty Jane Rhodes more or less captive but also stupidly allows Ray Whitley to perform for a small but ecstatic crowd, Ray in reality being in cahoots with Tim Holt, who has infiltrated nasty Robert Fiske's gang of cutthroats. And it is Ruth who overhears Tim confess that he in reality is working with sheriff Hal Taliaferro and soon the jig is up. Cue a bullet strewn finale.
While with the Holt RKO unit, Clifford also turned up in LAND OF THE OPEN RANGE (rel. 1942), but here she was merely a townswoman, the kind of minuscule part she played in most of her sound films. By the time I met Ruth Clifford, she was staying in in one of the bungalows at the Motion Picture Country House and Hospital in Woodland Hills, CA, the retirement facility that Mary Pickford and Jean Hersholt had help fund, and it was here she died at the ripe old age of 98 in 1998.