Statistics for occurrence #1 of “Mr. Peter C. Brooks” in chapter 1 of Historic leaves, volume 5, April, 1906 - January, 1907:

...ral old trees, and some of them, the hickories, if tradition may be believed, were in their prime at the time of the Revolution. A black walnut was planted on the estate some time previous to 1768. Mr. Peter C. Brooks set out a horse-chestnut in 1810, and an elm tree at a later time. On Main street, Medford, are three elm trees which are of interest, not so much from their age, which is said to be fifty or six...
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