1854 Francis Rawdon Chesney - The Russo-Turkish Campaigns of 1828 and 1829Two days of skirmishing outside the town were followed by a bold sortie headed by a dervish; and, as the result of this affair, a cartload of heads was sent as trophies to Constantinople.
(by extension) A large amount.
1850 Edward Everett - The Mount Vernon Papers. . . although a little apt to get buried under a cartload of written pleadings, . . .