And the noise was really more than half purr when the carpet suddenly appeared in its proper place, and on it, instead of rows of milk-cans, or even of milk-jugs, there was a COW.

Not a Persian cow, either, nor, most fortunately, a musk-cow, if there is such a thing, but a smooth, sleek, dun-coloured Jersey cow, who blinked large soft eyes at the gas-light and mooed in an amiable if rather inquiring manner.
Anthea had always been afraid of cows; but now she tried to be brave.
'Anyway, it can't run after me,' she said to herself 'There isn't room for it even to begin to run.' The cow was perfectly placid.

She behaved like a strayed duchess till some one brought a saucer for the milk, and some one else tried to milk the cow into it.

Milking is very difficult.

You may think it is easy, but it is not.