From history @familysearch.org:
James said of his birth: It was to a humble pioneer home, that of John Pincock and Isabelle Douglas Pincock, that I was born January 20th 1858 at Ogden, Utah. Father was away at the time and mother was alone. It was a typical January day. Bitter cold, and a raging blizzard made what few roads they did have impassable. Mother knew there was no chance to get help, so mustering all the faith and courage she had, she prepared as best she could, gathering what articles she would need to care for herself, and made her bed in front of the big fireplace, and awaited my arrival. Thus was the scene at the time of my birth. I am the fourth of fourteen children: Mary Ellen, John E., Isabella Alice, James Henry, Charlotte, Ann, Jane, George A., Vilate, Charles, William, Josephine, Richard D. and Wealthy.
When James was five his father was called to a mission for the Church of Jesus Christ of Latter-day Saints. He drove three yoke of oxen to Omaha, Nebraska, and was gone six months. James went barefoot from winter until winter, and never went to school more than three months at a time.
In April 1869 the railroad came to Ogden. James had helped to build a grade for the railroad and his interest and curiosity was high. When he heard the train he left his brother in the field with the plow and ran. James worked on the farm with his father and brother until He was about eighteen years old. In March 1879 he went with the company of men to look at the land in southeastern Idaho by Menan. He returned again in 1880.
In November 1881 James married Annie Elizabeth Garner, the girl he had known since she was thirteen years old. A year and a half later they went to Idaho to colonize with Thomas E. Ricks, a friend of his father.
They settled on the Island between the north and south forks of the Teton River, about two miles east of Sugar City, Idaho, on the Teton-Jackson Hole Highway. At first all they had was a log cabin with a dirt roof and a dirt floor. Later they built a new home on the same farm, (adobe covered with frame), and lived there until 1926 at which time they moved to Sugar City.
The sagebrush was cleared, roads, bridges, canals, schools and churches were being built, and in all these James played his part, both financially and physically. He was road supervisor for a number of years, Deputy State Water Master for twelve years, and it seemed, served on more juries than any other one man in the country.
They had no trouble with the Indians. They made them their friends, and they were very peaceable. They made their winter homes on both sides of the forks of the river. The game was good, and there was plenty of grass under the snow so their horses could winter out all winter. One "Squaw man" named Richard Lee, better known as Beaver Dick, lived up by little Hog Hollow. He was Indian Scout and trapper, and always a good friend of the early settlers.
A group of Anti-Mormons hired a schoolteacher, and utilized the School funds, and the Mormon children who couldn't get to that school were left out. They changed the name of the first settlement from Rexburg to "Kaintuck" (which later was changed back to Rexburg,) and changed the name of the post office. The Anti-Mormons did everything they could, outside of mob violence to make it as unpleasant as they possible could to drive the Saints out of the country.
James was made a Life Member of Scouting in 1932. The occasion was a Scout Camporee held in Idaho Falls, Idaho, in honour of the pioneers of the Upper Snake River Valley.
James passed away April 8th 1938 at Sugar City, Idaho. Interment in the Sugar City Cemetery. He was survived by the following sons and daughters: Mrs. Robert (Josephine) Thomson, James Frederick, Clarence Burt, Mrs. Wilford (Anna Belle) Ricks, Ida Fern, and Rulon D. and twenty-one grandchildren. His wife and a daughter Alice Pearl preceded him in death.