Letters from Henry to son Carroll

These two letters both came inside the scanned envelope above although the hand written letter was original to the envelope but the typed one is dated nearly 4 years later than the post mark.  The hand written letter was written on Jan. 4, 1921.  The typed letter was written on Dec. 13, 1924.  The post mark is Jan. 5, 1921.  I find it very interesting that the typed is on company stationary.  Henry Ezra Miles on the left corner, Mrs. Lois A Bell in the middle, and Miss Annie L. Bell on the right.  At the time of the letter Henry was not married to Annie Bell, but would marry her 10 years later in 1934.  She was his 3rd wife.  Lois Bell was Annie's mother.