On May 2, 1906, midway through President Teddy Roosevelt's second term and two weeks after the Great San Francisco Earthquake, the Kentucky Derby was run for the 32nd time at Churchill Downs. The $6,000 race on a Wednesday afternoon drew little national attention, and the victorious Sir Huon, a son of Falsetto named for a character in a German opera, made no lasting mark in the annals of American racing. It was, however, a landmark Derby in the history of analyzing and handicapping Thoroughbred racehorses: That 32nd Derby, run a century and two days ago, was the first for which printed past performances appeared in Daily Racing Form. The entire Derby PP's, a combined 27 running lines for the seven entrants, could have been pasted onto a 3x5 index card, and the information would seem somewhere between primitive and cryptic to today's horseplayers. Still, it was the basic framework for equine past performances that has now officially endured for 100 years, and the forerunner of the more robust data that will fuel much of the $100 million wagered this Saturday on the 132nd Derby. (Nearly a year earlier, the first instance of past performances in the Chicago edition of Daily Racing Form appeared on June 27, 1905 - for races at Coney Island.) A look at the Form's Derby past performances since , in 25-year intervals, reveals a long, slow evolution into the version that will appear in Friday's and Saturday's editions. Sir Huon had raced 12 times before the 1906 Derby, but his past performances consisted only of his last three starts - a 5 1/2-furlong prep at Brooklyn and two sprints at Coney Island. It is not clear from his PP's what kind of races they were or precisely when they were run: Instead of a date and race number, the 1906 running lines begin with a five-digit number, referring readers to a result chart available in previous editions of the paper or in a monthly chart book published by the Form. After that, the sequence of the running line is similar to the contemporary version, with familiar elements including the track, distance, track condition, winner's time, and weight. This is followed by five points of call during the race. Margins of lengths ahead or behind are given only for only the stretch and finish calls. The jockey's name then appears, followed by the three-horse company line of the race's top finishers - although without the later additions of lengths between finishers and weights. There also are obvious differences in the way information was reported in different regions of the country. Sir Huon and Velours, a 40-1 shot who would finish last in the 1906 Derby, had done their recent racing in New York, and the elements in their lines are arranged differently from their opponents who had been racing at Lexington, Memphis, and Nashville. This regionalization continued until the 1990's, when the Form merged three separate databases into one, which is now populated and maintained by the industry-owned Equibase company. Among the notable 1906 omissions from what contemporary players expect to see are the trainer's name and today's jockey, much less any attempt to quantify the quality of a race or describe the horse's effort. Nevertheless, the betting public managed to smoke out Sir Huon and bet him down to 11-10, and he triumphed by two lengths over the filly Lady Navarre, the second choice at 9-5. As for fifth-place finisher Debar, he may hold the distinction of having the first if not last Derby past-performance mistake: The son of Algol was listed in the PP's as a 4-year-old. Leap forward to PP's much like today's Twenty-five years later, the purse for , won by Greentree Stable's Twenty Grand, had jumped from $6,000 to $58,725, and more significant changes had come to the past performances than would be seen for another 60 years. The chart code had been replaced with a date and race number, and races were classified with an abbreviated condition distinguishing stakes, allowance, or handicap races. The trainer and the dam's sire were now listed, as were odds, post position, and field size for each previous start. Workouts and cumulative racing records had arrived as well, but not where today's horseplayer would look for them. A single "Last work" appeared above the running lines, while current and previous years' records and earnings appeared below each horse's lines. Two- and three-letter abbreviations for racetracks had replaced the fully spelled-out track names of 1906. Players of the era presumably knew that "Hav" stood for Havana, Cuba, home of the best winter racing, and not for Havre de Grace (HdG). The number of lines that appeared for each horse was erratic and followed no apparent scheme. Twenty Grand had made 10 career starts but had only eight running lines, while 10 of runner-up Sweep All's 11 lines appeared. Twenty Grand, part of a three-horse Greentree entry, won by four lengths and paid precisely $3.76 to win - breakage to the nearest 20-cent increment did not begin at Churchill Downs for another three years. was worth $167,550 and won by Needles - the first Florida-bred to secure the race - but horses' birthplaces were still not noted in their past performances. At least Needles's breeder, W.E. Leach, was listed under his pedigree, and the breeder's name was one of several additions since the days of Twenty Grand. The most significant addition was margins to all four points of call rather than just the final two call points, and designating whether a horse was favored in a race by putting an asterisk after his odds - odds that were still listed in the bookmaker style of "2-3" instead of "60" or "70" as they are today. Horses' current-year and previous-year earnings had by now migrated to their familiar spot in the upper right above their running lines, and the 1956 past performances listed the three most recent workouts for each horse. Also, the 1956 running lines added a "speed rating" for each horse's race, a mechanically derived comparison of each horse's running time to the track record. Needles, for example, had earned a speed rating of 101 for winning an "AlwS" at G.P. - the Florida Derby at Gulfstream Park, where he broke the track record by one-fifth of a second. More new figures, and a look at the future