[Footnote D: I find the same idea (a sufficiently obvious one) finely
expressed by Mr. Richard Hovey in his book of poems entitled _Along the
Trail_:
Look, how the overhead train at the Morningside curve
Loops like a sea-born dragon its sinuous flight.
Loops in the night in and out, high up in the air,
Like a serpent of stars with the coil and undulant reach of waves.]