Oxford Tree-Ring Laboratory - Virginia
(a) Felling dates: Summer/autumn 1835 and Winter 1835/6
Here seven samples were taken from five timbers, four of which were pine and one of oak. Two samples each were taken from two timbers. Samples hqf153a and hqf153b were combined to form the same-timber mean hqf153, and hqf155a and hqf155b were combined to form the same-timber mean hqf155. One other sample broke during coring and was treated as two sample (hqf151a1 and hqf151a2). The oak timber did not retain complete sapwood, but produced a last measured ring date of 1828, matching well with the oak samples from the ice house as well as the other Headquarters master chronologies. Only two of the pine samples dated, but fortunately both retained bark edge and produced precise felling dates of summer/autumn 1835, and winter of 1835/6. All of this evidence suggests a construction period of 1836 or within a year or two afterwards.
Miles, D W H and Worthington, M J, 2008 ‘The Tree-Ring Dating of Headquarters Farm Smokehouse, Brightberry Farmhouse, Walnut Level, and Mount Fair House and outbuildings, all in Browns Cove, Crozet, Albemarle County, Virginia’ unpubl ODL archive report 2008/39
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