Nice little hack. My favorite find of that sort came from a verse-finder in Python run over the text of The Lord of the Rings -- it was looking for <i>scansion</i>, not rhyme -- i.e., blank verse like Paradise Lost:<p><pre><code> One turned to stone. A brief vision he had
Of swirling cloud, and in the midst of it
Towers and battlements, tall as hills,
Founded upon a mighty mountain-throne
Above immeasurable pits; great courts
And dungeons, eyeless prisons sheer as cliffs,
And gaping gates of steel and adamant:
And then all passed.
</code></pre>
I suppose it's not a coincidence the longest passage the program found came at the climactic moment of the story.