It is a good thing to write for the amusement of the public, but it is a far higher and nobler thing to write for their instruction, their profit, their actual and tangible benefit.
Man is the only slave. And he is the only animal who enslaves. He has always been a slave in one form or another, and has always held other slaves in bondage under him in one way or another. In our day, he is always some man's slave for wages, and does that man's work; and this slave has other slaves under him for minor wages, and they do his work. The higher animals are the only ones who exclusively do their own work and provide their own living.
Agassiz does recommend authors to eat fish, because the phosphorus in it makes brains. But I cannot help you to a decision about the amount you need to eat. Perhaps a couple of whales would be enough.
Heroine: Girl in a book who is saved from drowning by a hero and marries him next week, but if it was to be over again ten years later it is likely she would rather have a life-belt and he would rather have her have it. Hero: Person in a book who does things which he can't and girl marries him for it.