When he had got the children fairly going and interested in playing it, he adapted it to a cribbage-board, and spent his days and nights working it out and perfecting it to a degree where the world at large might learn all the facts of all the histories, not only without effort, but with an actual hunger for chronology.  He would have a game not only of the English kings, but of the kings of every other nation; likewise of great statesmen, vice-chancellors, churchmen, of celebrities in every line.  He would prepare a book to accompany these games.  Each game would contain one thousand facts, while the book would contain eight thousand; it would be a veritable encyclopedia.  He would organize clubs throughout the United States for playing the game; prizes were to be given.  Experts would take it up.  He foresaw a department in every newspaper devoted to the game and its problems, instead of to chess and whist and other useless diversions.  He wrote to Orion, and set him to work gathering facts and dates by the bushel.  He wrote to Webster, sent him a plan, and ordered him to apply for the patent without delay.  Patents must also be applied for abroad.  With all nations playing this great game, very likely it would produce millions in royalties; and so, in the true Sellers fashion, the iridescent bubble was blown larger and larger, until finally it blew up.  The game on paper had become so large, so elaborate, so intricate, that no one could play it.  Yet the first idea was a good one:  the king stakes driven along the driveway and up the hillside of Quarry Farm.  The children enjoyed it, and played it through many sweet summer afternoons.  Once, in the days when he had grown old, he wrote, remembering: 

Among the principal merits of the games which we played by help of the pegs were these:  that they had to be played in the open air, and that they compelled brisk exercise.  The peg of William the Conqueror stood in front of the house; one could stand near the Conqueror and have all English history skeletonized and landmarked and mile-posted under his eye . . . .  The eye has a good memory.  Many years have gone by and the pegs have disappeared, but I still see them and each in its place; and no king’s name falls upon my ear without my seeing his pegs at once, and noticing just how many feet of space he takes up along the road.

It turned out an important literary year after all.  In the Mississippi book he had used a chapter from the story he had been working at from time to time for a number of years, ‘The Adventures of Huckleberry Finn’.  Reading over the manuscript now he found his interest in it sharp and fresh, his inspiration renewed.  The trip down the river had revived it.  The interest in the game became quiescent, and he set to work to finish the story at a dead heat.

To Howells, August 22 (1883), he wrote: