the blessing of all seamen,--as constant in all change
as its older sister has been fickle, and the second
cynosure of all lovers upon the waves, and of all girls
left behind them." "Amen," we cried, and then we sat in
silence till the clock struck ten; then shook each other
gravely by the hand, and left the South Middle dining-
hall.

Of waterfalls there were plenty that we knew.

Fly-wheels could be built of oak and pine, and hooped
with iron. Fly-wheels did not discourage us.

But brick? One brick is, say, sixty-four cubic
inches only. This moon,--though we made it hollow,--
see,--it must take twelve million brick.

The brick alone will cost sixty thousand dollars!


The brick alone would cost sixty thousand dollars.
There the scheme of the Brick Moon hung, an airy vision,
for seventeen years,--the years that changed us from
young men into men. The brick alone, sixty thousand
dollars! For, to boys who have still left a few of their
college bills unpaid, who cannot think of buying that
lovely little Elzevir which Smith has for sale at
auction, of which Smith does not dream of the value,
sixty thousand dollars seems as intangible as sixty
million sestertia. Clarke, second, how much are sixty