Thirty years.  Third corner turned.  Dives, bright sorrel, ridden by the fellow in a yellow jacket, begins to make play fast; is getting to be the favourite with many.  But who is that other one that has been lengthening his stride from the first, and now shows close up to the front?  Don’t you remember the quiet brown colt asteroid, with the star in his forehead?  That is he; he is one of the sort that lasts; look out for him!  The black “colt,” as we used to call him, is in the background, taking it easily in a gentle trot.  There is one they used to call the filly, on account of a certain feminine air he had; well up, you see; the Filly is not to be despised my boy!

Forty years.  More dropping off,—­but places much as before.

Fifty years.  Race over.  All that are on the course are coming in at a walk; no more running.  Who is ahead?  Ahead?  What! and the winning-post a slab of white or gray stone standing out from that turf where there is no more jockeying or straining for victory!  Well, the world marks their places in its betting-book; but be sure that these matter very little, if they have run as well as they knew how!

—­Did I not say to you a little while ago that the universe swam in an ocean of similitudes and analogies?  I will not quote Cowley, or Burns, or Wordsworth, just now, to show you what thoughts were suggested to them by the simplest natural objects, such as a flower or a leaf; but I will read you a few lines, if you do not object, suggested by looking at a section of one of those chambered shells to which is given the name of Pearly Nautilus.  We need not trouble ourselves about the distinction between this and the Paper Nautilus, the Argonauta of the ancients.  The name applied to both shows that each has long been compared to a ship, as you may see more fully in Webster’s Dictionary, or the “Encyclopedia,” to which he refers.  If you will look into Roget’s Bridgewater Treatise, you will find a figure of one of these shells, and a section of it.  The last will show you the series of enlarging compartments successively dwelt in by the animal that inhabits the shell, which is built in a widening spiral.  Can you find no lesson in this?

THE CHAMBERED NAUTILUS.

This is the ship of pearl, which, poets feign,
Sails the unshadowed main,—­
The venturous bark that flings
On the sweet summer wind its purpled wings
In gulfs enchanted, where the siren sings,
And coral reefs lie bare,
Where the cold sea-maids rise to sun their streaming hair

Its webs of living gauze no more unfurl;
Wrecked is the ship of pearl! 
And every clambered cell,
Where its dim dreaming life was wont to dwell,
As the frail tenant shaped his growing shell,
Before thee lies revealed,—­
Its irised ceiling rent, its sunless crypt unsealed!