The master went on. In certain fields of that country there are shining stones of various colours. The Yahoos are violently drawn to them.
When part of a stone is stuck in the ground, they will dig with their claws for whole days to get it out. Then they carry it off and hide stones in heaps in their kennels. Yet all the while they keep looking round warily, for fear their fellows will find the treasure.
The master could never discover the reason for this unnatural appetite, or what use the stones could be to a Yahoo. But now he thought it might come from the same avarice Gulliver had described in humankind.