Did Tolkien invent Lembas merely to fill in a hole in his plot - "How in the world did Sam and Frodo carry enough food to travel all that way?"
[edit: fixed spelling of "Lembas"]
"We have shed our blood in the glorious cause in which we are engaged; we are ready to shed the last drop in its defense. Nothing is above our courage, except only (with shame I speak it) the courage to TAX ourselves." --James Madison, 1782