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Instead, the Scots-Irish see their identity — shaped on the scrappy, Calvinist borderlands of England and Scotland, then sharpened on the tenant farms of Ulster — as indistinguishable from the land they made their own with the help of the long rifle and the surveyor’s compass.

The Makah Indians had seen and understood something of the mariner’s compass, but a surveyor’s compass was a riddle to them.

An instrument of considerable significance is another wooden surveyor's compass, in the collection of the Yale University Art Gallery.

Then Ethan Allen broke the surveyor’s compass with his own hands and tossed the fragments away.

The only surveyor's compass; and the worst of it is, 't was a borrowed one.