what information does the speaker's American friend supply?

A friend of the narrator’s, “a very worthy person,” has already heard the proposal and suggested that children of fourteen, too, be a potential food. The writer has dismissed this idea, though, because the flesh of fourteen-year-old boys is too lean, and fourteen-year-old girls might soon become breeders of infants themselves. He defends his friend, nevertheless, by saying that the friend learned of this practice in Asia among certain savage peoples. This digression continues with the observation that he is unconcerned about those adults who are ill, disabled, or starving, because there is nothing he can do for them.

Here is the quote

"I have been assured by a very knowing American of my acquaintance in London, that a young healthy child well nursed, is, at a year old, a most delicious nourishing and wholesome food, whether stewed, roasted, baked, or boiled; and I make no doubt that it will equally serve in a fricasie, or a ragoust.

I do therefore humbly offer it to publick consideration, that of the hundred and twenty thousand children..."

THis has to do with British exploitation of lands and people wherever they seem to go. Remember, it's a satire!