Leaning Woman; Sorta like Tracing

Here is some work I did yesterday. I started with the reference photo open in photoshop. Then I drew in the skeleton on a layer above the reference photo. Like so:

Then I made the background image invisible but left the skeleton. I then fleshed out the form around the skeleton. I would periodically bring the background image up to see if I was accurate. This helped to show me where I was having issues. I had very few issues with the upper body and was surprised at how close I was. The only trouble area was the left breast, which for some reason confounded me. But, the legs and feet were where most of my issues occurred. I had to redraw them several times to get them right.

Here's the resulting work:

BTW, I don't know to whom that original drawing belongs. If I did I would give credit. If it's yours speak up.