A tablet engraved about 3000 B.C.E. provides the earliest known example from Sumer, a roofed boxlike sledge mounted on four solid wheels.

来自公元前3000年左右的一块苏美尔的雕刻陶土板提供了已知最早的例证：一个带顶棚的箱状雪橇被安装在四个实心的轮子上。

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On the sledge, driving the reindeer, sat a fat dwarf who would have been about three feet high if he had been standing.

坐在雪橇上赶鹿的是个肥胖的小矮人，如果他站直了的话，大约只有三英尺高。

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He said each member of the team would be dragging a sledge weighing up to 120kg - "a very heavy rugby player" - for about 12 hours a day.

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