Through The Looking Glass by Lewis Carroll Chapter 3 Page 23

She went on and on, a long way, but wherever the road divided there were sure to be two finger-posts pointing the same way, one marked ‘TO TWEEDLEDUM’S HOUSE’ and the other ‘TO THE HOUSE OF TWEEDLEDEE.’

‘I do believe,’ said Alice at last, ‘that they live in the same house! I wonder I never thought of that before — But I can’t stay there long. I’ll just call and say “how d’you do?” and ask them the way out of the wood. If I could only get to the Eighth Square before it gets dark!’ So she wandered on, talking to herself as she went, till, on turning a sharp corner, she came upon two fat little men, so suddenly that she could not help starting back, but in another moment she recovered herself, feeling sure that they must be.