He was trained to mercantile pursuits, beginning at an early age as a clerk for the firm of John B. Valle & Co. of St. Louis.

[4][6][7] The use of the new diamond drill[8] and the 1893 arrival of a branch from the Mississippi River & Bonne Terre Railroad allowed the already-successful lead mining operations to expand.

Grandfather didn't agree with the location of the spit and split with Desloge to form his own company.Desloge soon sank a shaft and struck the same main vein and deposits as that of those he had worked at Bonne Terre before the fire.

[11][12] Desloge remained on the St. Joseph Lead Company board of directors until his death in 1929.

They had four children: Firmin Vincent III, Clara Cynthian, Edwin Owen, and Joseph.

[21][22] A 1909 biography statued, "His life record stands as an exemplification of the fact that success is not a matter of genius as held by some, but the outcome of clear judgment, experience and intelligently directed effort.