I know of two free patterns, one felted and one not. Here is the felted: http://rineke.blogspot.com/2007/02/generic-pattern-for-felted-maryjane.html And I LOVE these. They are on my to-do list: Here is a link that might be useful: Mary Jane Slippers

check out crochet pattern central....craftsy....ravelery....pinterest

Have you ever checked out Pattern Central? Link below is to slipper patters. Hope you can find that one, though, because it looks cute. Here is a link that might be useful: Pattern Central slippers

I'm late to the party, so I suppose the original poster will never see this, but... This last picture you provided helps a lot. That is totally a pocketbook slipper, just no strap. You make the triangle at the top (this is for flat-knit version), then increase by doubling all the stitches, then do a 2x2 rib (count up how many rows of dark rib there are and do that many, then switch to the 2nd color and continue) Keep going in a reverse fashion right on up the other side, and halve the stitches at the point where you previously doubled them. When finished knitting, you seam the heel and the toe area, leaving the 2nd side of the triangle open for the foot to slip in. I can't provide exact numbers because you need to measure to make up for th extra height needed to take its place. But follow the main pattern for pocketbook slippers to give yourself an idea of what to do. You could convert it to in the round fairly easily if you prefer. My Ravelry page has some variations: http://www.ravelry.com/projects/jvallas/pocketbook-slippers. This one is strapless, though my notes are super sketchy: http://www.ravelry.com/projects/jvallas/seamless-salomas-slippers. Well, after all that, I just found the pattern for your slipper. It's what I based that 2nd project of mine on: http://www.ravelry.com/patterns/library/seamless-salomas-slippers