a1855  (1956)  All had now retreated for shelter to the thick woods, so that we were more than once on short allowance and on these emergencies had to regale ourselves on wolf's flesh. . . .
1870  Ten year's residence in the North-West . . . has made him at home . . . on snow-shoes, in the thickwood, or the boundless prairie. . . .
1907  Strong gale with Snow and Sleet. Obliged to move into thick woods.
1957  The gold-seekers had arrived at the fort after making their way through the thickwoods and the wild Blackfoot hills. . . .