[The word defined is written as "Ob(b)iquicki(e)us" (the "e" is circled, perhaps suggesting a later revision to combine the "o" and "e") The definition which follows is: "Obiquickeous is a cube sensibilitant word. One of the most important words. It is an adj. and a noun."] _Invention of games_. D has invented many games. To illustrate this aspect of his mental capacity, there are his designs for three-handed and four-handed checkers. [4] D held that these would be better games than two-handed checkers because they are more complicated. A description of the games invented by D, together with his mathematical calculations concerning the chances and probabilities in each, would fill many pages. _Calculation and mathematical ingenuity_. It is difficult to say that D is more gifted in one mental function or group of functions than in others, for his ability is so extraordinary in all performances that without means of measurement one cannot tell in which he deviates farthest from the average. However, it is to be observed that the quantitative aspects of experience have always played a very striking role in all his performances. Even in dealing with color he turned to mathematics and made his values quantitative. Throughout childhood he spent hours playing with numerical relationships. These calculations cover hundreds of pages. There is reproduced here a sample of such work, chosen at random from scores of like material. There is no doubt in the mind of the present writer [[L. S. H.]] that D could, by practice with short-cut methods, easily become a lightning calculator. By age of 12 years D had finished college entrance requirements in arithmetic, algebra, geometry, and trigonometry, all with high marks. FIG. 7. Playing with numbers, Child D, age 7, to find what number under 100 has the greatest number of factors, counts up factors in each and awards "highest honors" to 96. [This figure lists the numbers 86-100, and shows the numbers factored. The winning numbers he included are 96 (6 [factors]), 48 (5), 24 (4), and 16 (4). It appears that he ranked the "winning" numbers not according to the actual numbers of the places (i.e., 1st, 2nd, 3rd, and 4th places), but rather by the order of the primes representing them, i.e., 2 is first place, 3 is second place, 5 third, and 7 fourth. Additionally, the notes "H. C. F" and "L C. M." are to the left of the 96 and 16, respectively, likely indicating "highest common factor" and "lowest common multiple" of the factors of the "winning" numbers.]