Thanks Jack for your feedback. I do remember Julie telling me there are two Hellen avocados. One is with one "L" Helen, and the other with two "LL" Hellen. I don't remember which one she said is the better tasting one. You must have the good one. I had purchased a grafted seedling of it from Julie years ago from the GreenScence at CSUF but I killed the plant from neglect.
Greg, glad you are commenting here on this subject. Of the three unknown varieties I mentioned, I though the Derek looked more like a Bacon since some seeds are pointed. But I did compare some of these fruits to Brad's Bacon fruits he sent me and it seems to be different.
The Nancy fruit/tree was said by the worker/gardener at the time at the Huntington Library that this one avocado tasted the best of what they were growing so he grafted it to the current mother tree. I just read again the UCR description of the Bacon since Brad says he thinks these are bacon avocados. The growth habit of this tree sounds similar to the Bacon tree description (vigorous, tall and slender). But the other two (Derek and Hamada) do not match the tree growth description. The are vigorous, busy, wide branches, not slender trees at all. Only the Nancy is could be considered slender. Aslo the leaf color of juvenile and adult leaves do not match the bacon tree descriptions.
As for best early fruiting like these, the Hamada is as good or better than the Fuerte to me. The fruit also has a long shelf life, and even though the skin may look old/wrinkled as I showed, the inside usually is clean and tastes very good. Of all of these three the best one for me is the Hamada fruits. I would say it is better all-around than a Fuerte. It also has a high production of fruits.
Let me post a few more photos of the Hamada (giant) avocado tree and fruits again.
Kaz, to clear up Hellen question of one L or two LL's Julie, had told me two LL hellen was good and one L helen not very good.