[Ads-l] Digs: mystery citation?

[dave@wilton.net]

The OED (old entry), Green's, and virtually every other secondary source all list the following as the first use of "diggings" to mean lodgings:
 
1838 J. C. Neal Charcoal Sketches II. 119 (Farmer) I reckon it's about time we should go to our diggings.
 
But when I look at all the digitized editions of "Charcoal Sketches" that I can find online (HathiTrust, Google Books, Nineteenth Century Collections Online, newspaper databases, etc.) nothing even remotely similar to this quotation appears anywhere in any of them, at least not that I can find. Neal's work appeared in three volumes over a decade or more, but I'm drawing a blank on all of them.
 
The "Farmer" would appear to be a reference to Farmer & Henley's Slang and Its Analogues, which has this exact citation. (It could also be a reference to Farmer's earlier Dictionary of Americanisms, but that work doesn't include the details of volume and page number.) Could it be that Farmer mixed up his sources and every subsequent lexicographer simply relied on him without bothering to look at the text itself? That strains credulity.
 
Am I missing something obvious?

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