Beyond parody

It has come to my attention that some people are not aware that "You Are Old, Father William" is, like much else in the Alice books, a parody of an existing poem. The problem is that the original has faded out of public consciousness, so now people are only aware of the parody.

Lewis's version: http://en.wikisource.org/wiki/You_Are_Old,_Father_William
The original: http://en.wikisource.org/wiki/The_Old_Man%27s_Comforts_and_How_He_Gained_Them