The Billy Sunday campaign published a souvenir booklet in 1910 that summarized the Springfield, Illinois campaign (Feb 26 – Apr 12, 1909). The following narrative shared much about the Rev. William A. ‘Billy’ Sunday

Rev. W. A. Sunday
WILLIAM ASHLEY SUNDAY is the best beloved and the most abused, the simplest and the most misunderstood, the most soulful and the most like a vaudeville performer, the most powerful in oratory and the least appealing to the emotions, the most persuasive and the most controversial, the most scholarly and the plainest, not to say coarsest, the greatest poet in essence and the greatest scrapper, of any man on the forum, the platform, or the stage of the world today.

He has been styled, the polygonal preacher, because he has so many sides, each a complete, finished, forceful fact. A character picture of the man, to be complete, must be a description of each of these baker’s dozen sides of his personality, none of which is much more important than any other one. The most that can be done within a small space—or indeed within any limitation of space—is to sketch in broad lines the mere outlines of this evangelist who is preaching the gospel of peace on earth and fighting the devil with the hottest of fire at the same time.
His father was killed in the civil war. The little boy was sent to the Iowa home for soldiers’ orphans. Later he made his own living at a youthful age, and his school teacher of that time says she would often watch him on the playground and wonder whether he would be the greatest crook or the greatest power for good in America—she was even then sure he would be one of the two. The boy took the right hand road.
When a young man he was a locomotive fireman on the Chicago and Northwestern Railroad and lived at Marshalltown. This was also the home of the famous A. C. Anson, captain of the old Chicagos, who watched Billy Sunday play baseball on corner lots while at home in Marshalltown. Anson took him to Chicago, discovered in him a great baseball player, and Sunday held the record for base running for years, a record which he still holds; was the second man chosen on the All-American team to tour the world—an accident to his knee kept him from making the tour—and was a popular idol of the fans.
An old time catcher for the Louisville team says that in those days when en route the rest of the men would play poker in the Pullman, but Billy Sunday was always back on the cushions with a book. He has kept close to books ever since. He has a remarkable faculty of choosing the very best and most authoritative writing on any particular subject and reading that only—and hence the range of subjects upon which he is thoroughly and accurately informed, includes almost everything from histology to astronomy and from bacteriology to history—it is a little interesting to notice that chemistry is the one topic unmentioned in his sermons. Three medical college professors who met at the end of his sermon which includes a half hour of the deepest microscopical pathology, agreed that William A. Sunday is the only layman they ever heard or read who was accurate in all he said about medical science.
One night a bunch of baseball players strolling along a Chicago street ran into a curbstone evangelist and stopped to be amused. Sunday stayed after the others went on. He went from there to the Pacific Garden mission, where he was converted. He kept on playing baseball, and nobody who ever heard it will ever forget his own description of how the others of that famous Chicago team approved his home run into Christianity.
A little later he was employed by the Chicago Young Men’s Christian Association at a small salary, only part of it paid during the panic of 1893, and refusing offers of $500 a month to return to the diamond. As a part of his work, he addressed groups of men—he always did know men, because of his early life and hard struggles. The addresses became longer and stronger with the growth of the work and experience in it. That great evangelist, Wilbur F. Chapman, took Sunday away from the Chicago Y.M.C.A. to be his assistant. Sunday learned the art of evangelizing and after learning it thoroughly treated it as Napoleon treated the art of war—he re-made it for himself, so that its old practitioners hardly recognize it, and at the same time made it produce victories hitherto undreamed of. The William A. Sunday methods of campaigning for Christ are unlike any others; they include the best of those of the past and many things unique; probably only Sunday could use them successfully in all their details; but it seems certain that they have factors not found in most others which really are the corner stones of successful work in evangelism. Some of the chief parts of the art of evangelism, as practiced by William A. Sunday, are these: Absolute accuracy in every statement made, whether one of the essential parts of the argument, or merely an illustration; hew close to the line that Jesus Christ laid down, regardless of the falling chips, and wherever that line leads; use language that everybody can understand, never talk down to an audience, but be lucid to the most ignorant while you are talking up to the most scholarly persons before you; avoid sectarianism; demand united work from all the evangelical churches in the city, and push united work by all the members of those churches; roast the skin of vice and sin in all its forms, from backsliding and carelessness to murder and adultery, rub salt into the burnt flesh, and then apply a healing balm that causes the object of the criticism to leave the tabernacle chastened in spirit, but loving the rod that smote him; avoid all fads and fancies, all tangential movements of society, but do a common thing in a most unusual way; and—many others. Starting with small towns and a few hundred converts at each series of meetings, the same plan of campaign has been used for all the years involving campaigns in cities of all sizes, and the first meetings years ago were, so far as Mr. Sunday is concerned, almost exactly like the meetings in Springfield. Of course, some minor modifications have been made, but these are few. Always there are the first sermons to get the church members back out of the world into the influence of Christ and to get the public to come to the tabernacle—the public seems to find its greatest attraction in hearing church-member hypocrites and Pharisees skinned like eels. Always the strenuosity of the sermons almost imperceptibly lessens gradually until the preacher who preaches as man never preached before is less athletic and more rhetorical about the middle of the series. Then, to the amazement of people who judged the man from his first pulpit stunts, the Reverend William Ashley Sunday preaches like the great orator that he is, the scholar that he is, the poet-philosopher that he is. This many sided man cannot be even sketched within a hundred pages. There is competent authority for saying of him these superlatives as being strictly true: He understands the minds and feelings of men as few men ever have done. He is one of the greatest orators the world has ever seen—and this is proved by the results of his work.
He is one of the most remarkable stylists in literature, his perfect imitation in one hour of the styles of Carlyle, Gibbon, Ingersoll, and several other writers of individual styles being an unprecedented feat.
He is said by scientists to be the most—and indeed the only—perfectly accurate preacher in matters of science. And a large part of his sermons deal with science.
He appeals entirely to the reason of the people, and rarely or never to their emotions, and in this he is the greatest of evangelists in the opinion of many people.
In numbers of converts, dramatic height of scenes, and wonderful stirring of the audience, several of his meetings have eclipsed anything in the history of evangelism since pentecost—and the most of these have been meetings for men.