Bladderwalk-y

With apologies to Lewis Carroll...Twasn’t brilliant, and the nighttime coves
  Did show no sparkle in the waves:
Still shady were the darkening groves,
  And the footpaths the same.
"Beware the Bladderwalk, my son!
  The urge that wakes, makes your breath catch!
Beware the vision blurred, and shun
  The nightytime Slumbersnatch!"
He took his blankets, warm, in hand:
  Long time the prodigious urge he fought --
Still resting, he with his full ‘tummy’,
  He laid awhile in thought.
And, as in gloomy thought he lay,
  The Bladderwalk did lastly claim,
To come whiffling through the dark causeway,
  And burbled as it came!
One, two! One, two! And through and through
  The blankets, warm, went snicker-snack!
He sprightly fled, into the ‘head’
  Then went galumphing back.

"And, has thou slain the Bladderwalk?
  Then back to bed, my beamish boy!
O frabjous day! Callooh! Callay!'
  He chortled in his joy.

`Twas brilliant, and the daytime coves
  Did sparkle brightly in the waves;
All misty were the brightening groves,
  But he never got to sleep again.