We still know so little about how the brain interacts with the body chemistry or, for that matter, whether we should be talking about the brain or the mind, that it would be perilous to hazard any guess about the way Abraham Lincoln's biological health may or may not have affected him. Of course, we don't have Lincoln on hand to ask him directly; but even if we did, we still might not be able to make sense of how all the parts worked together.

No one loves an archive better than I do. I can smell a good one half-a-block away - all that brittle papyrus dust is music to my nostrils.

I think, a general anxiety, after the end of the Cold War, to find a new basis for affirming American nationhood. And perhaps another, in plainer terms, is the lure of the approaching Abraham Lincoln bicentennial has been made a resurgence in interest in Lincoln.

It would be pleasant to believe that some of Lincoln's DNA is actively swimming around in somebody's soup, but all the evidence is against it. And of course, there's always the risk that what we might get would be more Robert Todd Lincoln than Abraham Lincoln.

Was all of Stephen A. Douglas's promotion of 'popular sovereignty' a plausible device for getting him elected president? With his death in June, 1861, any possible answer to that question went to Douglas's grave with him.

I suppose I've been interested in Abraham Lincoln for almost as long as I can remember. My first Lincoln book was the Classics Illustrated comic book version of the life of Lincoln, and with that, I was hooked.

Corporate organization in American business and commerce was already well under way by the time Abraham Lincoln became president. But all the evidence from his pre-war lawyering days is that he had little objection to the rise of corporations. As a state legislator, he had strongly favored the creation of an Illinois state bank, as well as sponsoring the chartering of public/private corporations like the Illinois Central Railroad.