A fact from La tentation appeared on Wikipedia's Main Page in the Did you know column on 21 March 2012 (check views). The text of the entry was as follows:
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Pitou calls this guy Hygin-Auguste as does Casaglia. I did find a more complete name Hygin-Edmond-Ludovic-Auguste Cave here. Seems there is an oil portrait by Ingres at the Met in NY. --Robert.Allen (talk) 02:09, 13 March 2012 (UTC)[reply]
Perhaps this is not very strong corroboration, but the Almanach des Spectacles de 1831 à 1834 gives the date as 20 June 1832 on p. 27, which is consistent with the printed libretto. --Robert.Allen (talk) 04:11, 14 March 2012 (UTC)[reply]