There was no doubt about the latter assertion, I thought, as I looked up at the overhanging boughs of the great trees, with the sun coming glittering through the leaves, and listened to the song of the summer blackbirds as it mingled with the sound of the backwater near us. So not being able to say why I wanted the locks away--which, indeed, I didn't do at all--I held my peace. But Walter said-- "You see, guest, this is not an age of inventions. The last epoch did all that for us, and we are now content to use such of its inventions as we find handy, and leaving those alone which we don't want. I believe, as a matter of fact, that some time ago (I can't give you a date) some elaborate machinery was used for the locks, though people did not go so far as try to make the water run up hill. However, it was troublesome, I suppose, and the simple hatches, and the gates, with a big counterpoising beam, were found to answer every purpose, and were easily mended when wanted with material always to hand: so here they are, as you see." "Besides," said Dick, "this kind of lock is pretty, as you can see; and I can't help thinking that your machine-lock, winding up like a watch, would have been ugly and would have spoiled the look of the river: and that is surely reason enough for keeping such locks as these. Good-bye, old fellow!" said he to the lock, as he pushed us out through the now open gates by a vigorous stroke of the boat-hook. "May you live long, and have your green old age renewed for ever!"