Gabion, a cylinder basket, open at both ends, about three feet wide, and as much in height

Print shows a gabion.

Caption continues: They serve in sieges to carry on the approaches under cover, when they come pretty near the fortification.
Illus. in: A new military, historical, and explanatory dictionary ... / Thomas Simes. Philadelphia : Sold by Humphreys, Bell, and Aitken, 1776.
Published in: The American Revolution in drawings and prints; a checklist of 1765-1790 graphics in the Library of Congress / Compiled by Donald H. Cresswell, with a foreword by Sinclair H. Hitchings. Washington : [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1975, no. 908.