"The fruits and cereals of a vegetarian meal might well find mention in the purest and most delicate poem. Could the same be said of the repast of a flesh-eater ? What are the dainties which Porphyro, in Keats's Eve of St. Agnes," heaps with glowing hand for his love, in the retired quiet of the night?"
January 1, 1970
https://en.wikiquote.org/wiki/A_Plea_for_Vegetarianism_and_Other_Essays