Profoundly grateful, and as if I had swallowed a small baby. … Why, they are perfect beasts of oysters!
Source, in full
Thackeray's reply when asked how he felt upon eating an unusually large American oyster during his first visit to the United States (1852–3); reported in James Grant Wilson, Thackeray in the United States: 1852–3, 1855–6 (New York: Dodd, Mead and Company, 1904), pp. 81–82.