Upper ten thousand

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the ten thousand, more or less, who are highest in position or wealth; the upper class; the aristocracy.

See also: Upper

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Dickens, he said, was for the million, and Thackeray was for the upper ten thousand. His view amused me at the time, and yet I am not sure that it was altogether mistaken.
* The English and Australian Cookery Book: Cookery for the Many, as well as for the Upper Ten Thousand by an Australian Aristologist, http://nla.gov.au/nla.aus-vn4511474 1864