I've come across one image recently, though - this one:
[caption id="attachment_5309" align="alignnone" width="390"]
That lady is not using a distaff, but instead she's holding two filled spindles in her left hand, and plies the threads together with the spindle hanging below her right hand.
Now that's definitely a rare picture, and a method I do have to try! Anyone here ever tried plying this way already? Or do you know more pictures like this? (Or, while I'm already blegging, images of spinners not in the classical one-arm-fully-extended position?)