Carried by Capt. William Clark on the Lewis and Clark Expedition to the Pacific Coast in 1803-1806.
USNM 38366. FIGURE 85.
[Ill.u.s.tration: Figure 85.--Pocket compa.s.s made and signed by Thomas Whitney of Philadelphia. With original carrying case. Carried by Capt.
William Clark on the Lewis and Clark expedition to the Pacific Coast, 1803-1806. USNM 38366.]