Now goblins are cruel, wicked, and bad-hearted. They make
no beautiful things, but they make many clever ones. They
can tunnel and mine as well as any but the most skilled
dwarves, when they take the trouble, though they are usually
untidy and dirty. Hammers, axes, swords, daggers, pickaxes,
tongs, and also instruments of torture, they make very well,
or get other people to make to their design, prisoners and
slaves that have to work till they die for want of air and
light.
[ The Hobbit, by J.R.R. Tolkien ]