By the time, Carter was 20 years old he had mastered the trade.
In 1871, he is listed as working for William P. S. Cadwell a druggist and chemist with a shop at 49 Purchase St.
In 1875, he and his wife, a "hairworker" are living at 66 Purchase st.
In 1887, he is listed as a druggist at 141 Purchase St. and living at 237 Kempton St.
In 1892, he is listed as a druggist at a shop on the corner of Kempton St and Cedar St, and he is living at 722 Kempton St.
He was certified as a registered pharmacist on January 5, 1896 and came to own and managed 5 pharmacies in New Bedford and Boston.
In New Bedford directories for 1897, 1898 and 1904 he is not listed in New Bedford and my have gone to Boston by then.
This is conjecture.
His career lasted 37 years.