

"I admit," said he-when I mentioned to him this objection-"I admit the truth of your critic's facts, but I deny his conclusions.

But my poor old friend's answer appears to me completely to meet it. This objection is plausible, and, to Spacelanders, almost irresistible, so that, I confess, when I first heard it, I knew not what to reply. The first objection is, that a Flatlander, seeing a Line, sees something that must be thick to the eye as well as long to the eye (otherwise it would not be visible, if it had not some thickness) and consequently he ought (it is argued) to acknowledge that his countrymen are not only long and broad, but also (though doubtless in a very slight degree) thick or high.
