A mature lady friend down the street has 3 pear trees. One is definitely a Bartlett, the 2nd has green with a pinkish-red blush on one side, and finally the third is a yellow with brown patches. The 2nd and 3rd ripen October-November. The 2nd tree I believe to be either a Kieffer or Comice and the other could be a Winter Nellis pear. Any other ideas ?