My husband and I recently purchased the "Hedrick Homestead" in Harbor Springs. Thre are some very old apples trees on this property and I am thinking they may go back to when UP Hedrick's family homestead the property in the mid 1870s. UP Hedrick (https://en.wikipedia.org/wiki/Ulysses_Prentiss_Hedrick) was a nationally renown pomologist and horticulturalist. Many of these large trees are "mostly dead" and on their "last leg", but they are still producing fruit. I would like to know how old these trees are, if they are a rare, "extinct" variety, how to restore them to good health and avoid disastrous, good intention mistakes .