The strip was written by Bill Conselman (1896-1940) who also scripted for the silver screen, including an Ella Cinders film in 1926 starring Colleen Moore (with a cameo by Harry Langdon as himself!) The artist was Charlie Plumb (1899-1982), who continued with the strip into the early 1950s, though latterly with other artists ghosting in his place (I'm not too keen on the 1940s and later incarnation of Ella, who survived into the 1960s).
Here's my collection of Ella Cinders sheets (they measure 15.25 x 22.5"), with Ella herself keeping guard. There are some beautifully drawn mastheads (eg. the ogre above).
There are some lovely high resolution Cinders strips to be found at Digital Funnies, and a great archive also at Barnacle Press. Below we see Ella at the museum... which reminds me that a recent Charlie Jefferson panel (my DFC strip) has a similar view - I just noticed the coincidence while putting this post together.