This info is probably just a long shot.I have no idea about this Allen family.However, that name James H. Alexander seemed to ring a bell.Could it be that his name was actually James Hardin McAlexander?In that generation, the McAlexanders were beginning to drop the "Mc."
According to the 1860 census of Cedar Co., we have the following entry:Samuel, age 40; Sarah Elizabeth, age 39; Milton Lee, age 18; James Hardin, age 17; Iyore (?), age 15; Mary W., age 13; Lucy F., age 4; Josephine, age 2; and John F., age 6 months.Note that the age for this James H. agrees with the age of your James H. Alexander. If these two are one and the same person, I have no idea why he was living in the neighboring Cedar Co., unless he was working out his room and board as a farmhand, or the like.My James H. was the son of a Samuel McAlexander, Jr., who was living in Cass County, MO, ten years earlier, according to the 1850 census. His grandfather was Samuel McAlexander, Sr. who, according to the census, was living in Saline Co., MO. in 1840. After my James H. had left home, his parents and younger siblings were living in Henry Co. in 1870, according to census data.The 1880 census found this family living in Vernon Co., MO.The 1880 census shows that my James H. was living in Platte Co. with his wife, Rachel Lucinda Walker (or, Walkingstick), and seven children.He died in Platte Co., MO in 1912.
Milton Lee McAlexander, James Hardin's older brother, left many descendants around Stockton and El Dorado Springs, MO.He and his wife are buried in the Hackleman Cemetery in Cedar County, MO.
(Samuel McAlexander, Sr., was a first cousin of my ggg grandmother, Margaret Ann [McAlexander] Harris.The McAlexanders were originally from Patrick Co., VA, as were my line of Harris'es.)