Well, he said to himself, this should be an easy one. Just flip through my copy of Constant Reader (Viking, 1970) and find the review. There are only a few novel reviews and some of them are positive. Easy.
Nothing in the novel reviews. He checked again. Still nothing. Maybe the quote is misworded and “book” rather than “novel” is at issue. He flipped through the entire volume. Still nothing.
Hmm. The jacket copy says that only “Thirty-one, in part or in full, of the forty-six Constant Reader pieces are gathered here…” It could be in one of those omitted.
Maybe the Internet had a clue. Dozens of Google hits later, he found that the entire world likes to quote this slam, but only a tiny few give Constant Reader as a source, and only a few more attribute it to “a book review.” Most just quote it.
Fine, he said. You have a humor collection that spans eight full bookcases. Time to delve into the archives. Out came the Dorothy Parker biographies, the tributes to the Algonquin wits, the histories of The New Yorker. Nothing, nothing, nothing. Past secondary sources into the tertiary ones. Studies of the 1920s. Famous women comedians. Humorous quote collections. More nothing. (Although, he noted, older books tend not to include this quote at all. Hmm, again.)
Finally, gibbering under an enormous pile of books, he came to a realization:
The quote could come from a “Constant Reader” column that was not collected into the book. Very possible. The quote could have been said in conversation and just attributed to her column. Very possible. The quote is a good line and has been (perhaps recently) attributed to Parker because it sounds like one of hers. Very possible.
And slowly he sank into catatonia, waiting for Eve, the only other Doper who might possibly have greater resources to glean from, wondering, wondering, wondering…