Long ago, also, he had picked out Mr. Harry P. Karstens, of Fairbanks, as the one colleague with whom he would be willing to make the attempt. Mr. Karstens had gone to the Klondike in his seventeenth year, during the wild stampede to those diggings, paying the expenses of the trip by packing over the Chilkoot Pass, and had been engaged in pioneering and in travel of an arduous and adventurous kind ever since. He had mined in the Klondike and in the Seventy-Mile (hence his sobriquet of "The Seventy-Mile Kid"). It was he and his partner, McGonogill, who broke the first trail from Fairbanks to Valdez and for two years of difficulty and danger--dogs and men alike starving sometimes--brought the mail regularly through. When the stampede to the Kantishna took place, and the government was dilatory about instituting a mail service for the three thousand men in the camp, Karstens and his partner organized and maintained a private mail service of their own. He had freighted with dogs from the Yukon to the Iditarod, had run motor-boats on the Yukon and the Tanana. For more than a year he had been guide to Mr. Charles Sheldon, the well-known naturalist and hunter, in the region around the foot-hills of Denali. With the full vigor of maturity, with all this accumulated experience and the resourcefulness and self-reliance which such experience brings, he had yet an almost juvenile keenness for further adventure which made him admirably suited to this undertaking. Mr. Robert G. Tatum of Tennessee, just twenty-one years old, a postulant for holy orders, stationed at the mission at Nenana, had been employed all the winter in a determined attempt to get supplies freighted over the ice, by natives and their dog teams, to two women missionaries, a nurse and a teacher, at the Tanana Crossing. The steamboat had cached the supplies at a point about one hundred miles below the mission the previous summer, unable to proceed any farther. The upper Tanana is a dangerous and difficult river alike for navigation and for ice travel, and Tatum's efforts were made desperate by the knowledge that the women were reduced to a diet of straight rabbits without even salt. The famine relieved, he had returned to Nenana. The summer before he had worked on a survey party and had thus some knowledge of the use of instruments. By undertaking the entire cooking for the expedition he was most useful and helpful, and his consistent courtesy and considerateness made him a very pleasant comrade. Of the half-breed boy, Walter Harper, the author's attendant and interpreter, dog driver in the winter and boat engineer in the summer for three years previous, no more need be said than that he ran Karstens close in strength, pluck, and endurance. Of the best that the mixed blood can produce, twenty-one years old and six feet tall, he took gleefully to high mountaineering, while his kindliness and invincible amiability endeared him to every member of the party.