The following two newspaper articles are the only written information we have found about Henrietta Janes Cox and her son, Isaiah Cox, Jr.
ISAIAH COX, PIONEER TO DIXIE IN 1862, REACHES 85TH MILESTONE
Monday June 5th, marked the 85th milestone for Isaiah Cox, acclaimed as the first white child born in Mt. Pleasant, Sanpete county, Utah. Mr. Cox has been ill for a month, hence the celebration of his anniversary was limited to a dinner for immediate family members.
Born June 5, 1859, in Mr. Pleasant, his parents were Isaiah Sr., and Henrietta Janes Cox, early LDS converts and pioneers to Utah in 1847. The family came to Utah's Dixie cotton mission in 1862, when Isaiah was scarcely three years old. He learned early the business of pioneering, and drove a team before he was in his teens. He was one of the boys who helped to gather the small black rocks from the ridge west of town to be hammered into the immense underground marsh on which the great white temple of St. George was erected.
In November 1871, he married Abigail McMullin who was the mother of his seven children. In making a living for his family he farmed and freighted, and later worked at Silver Reef, during the boom days of that mining camp. He has hauled ore and supplies for most of the mines in this area, and has driven mail contracts and for many years worked as a blacksmith. His wife died in 1904.
On February 8, 1912, he married Miss Annie Middleton of Cedar City, and they have continued to make their home in St. George. Mr. Cox has been well known as a community entertainer, and until recently was an excellent dancer and could "cut a real figure" in step dancing, often appearing on community programs.