DOB given as 2/3/1848. Further bio there.

Henry J. Detwiller, son of Dr. Charles L. M., was born Feb. 3, 1849. He was educated in schools at Freidensville, Quakertown and Doylestown, after which he attended the Polytechnic College at Fifteenth and Market streets, Philadelphia, for a chemical course. He then entered the wholesale drug business in Philadelphia, for a time and later took an extra course in chemicals and explosives in Cooper Institute, New York. After having engaged in the manufacture of explosives and fireworks in New York for five years, he traveled by water to California and was engaged from 1872 to 1875 in mining and chemical work along the Pacific coast from British Columbia to Chili. He then became a chemist with the Bethlehem Iron Company for eight years and in 1883 opened a private laboratory in analytical work on cement and other mineral resources, which he still conducts, having been one of the pioneers in this line of work. He married Oct 19, 1882, Anna Arabella, daughter of Henry .1. and Anna Maria (Goundie) Saeger, and they have two daughters, Mary S. and Anna S. Mr. Detwiller and family are members of St John's Lutheran Church. Mrs. Detwiller is an active member of Liberty Bell Chapter, D. A. R.