Enclosure II, Diagram: Back of Bison Skull, 10 June 1802
II
Diagram: Back of Bison Skull
View of the Back part that Joins the neck

From A to B 2 feet 5 Inches. Circumference at C 21 Inches. |
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The Hollow part above F I believe is part of the Cavity to receive the muscles that lift the under Jaw. at G is the inner surface corrisponding, measurement across 9 Inches. That part which should join the1 hind part comprising the Ear is defficient. |
ditto at D 17 Inches—
E hole for the spinal marrow 2 Inches wide & the debth in the recess for the Brains 8½ Inches: the complete cavity for the brains
a, a, a, a, is the articulation for the Atlass
MS (DLC: TJ Papers, 124:21496); in Peale’s hand.
1. Peale here canceled “back.”