1769. Smeaton, in Brand, Newcastle (1789), II. App. 586. The stones may be laid hold of by eye-bolts fixed in holes bored with a jumper.
1794. Rigging & Seamanship, I. 35. They are mostly fitted with a … sprig-eye-bolt driven in the middle of their ends.
1859. F. A. Griffiths, Artil. Man. (1862), 116. They hook the fixed blocks to the eye-bolts.
