A Connecticut Yankee in King Arthurs Court by Mark Twain Chapter 12 Page 4

suit of armor without any pockets in it. You see I had my handkerchief in my helmet; and some other things; but it was that kind of a helmet that you can’t take off by yourself. That hadn’t occurred to me when I put it there; and in fact I didn’t know it. I supposed it would be particularly convenient there. And so now, the thought of its being there, so handy and close by, and yet not get-at-able, made it all the worse and the harder to bear.

Yes, the thing that you can’t get is the thing that you want, mainly; every one has noticed that. Well, it took my mind off from everything else; took it clear off, and centered it in my helmet; and mile after mile, there it stayed, imagining the handkerchief, picturing the handkerchief; and it was bitter and aggravating to have the salt sweat keep trickling