About the "Origin" pages:

Eliot sometimes incorporated portions of his other poems into The Waste Land. He would use both published and unpublished poems and sometimes the work of others. These pages discuss this.

This is one type of four types of pages that elaborate on the evolution of The Waste Land and Eliot's other poetry:

Origin:
Where Eliot picked up some of the lines.
Draft:
Shows previous versions of lines prior to publication. Also these discuss large sections of the poem that were exorcized.
Change:
Discusses changes made to the poem since its original publication.
Compare:
Compares the lines to those in other Eliot poems.

[List all page types]