Together with his older brother Peter Adolf, Hall studied medicine and 'natural history' between 1753 and 1755 at Uppsala University's medical faculty where Carl Linnaeus taught.
In the following years, 1755–59,he pursued further medical studies abroad, under the guidance of master Lars Brisman, including in Greifswald (Swedish Pomerania), Berlin and Hamburg.
Linnaeus disciple and fellow student Carl Peter Thunberg named a flowering and fruit-bearing species after Hall.
To get an idea of all that he had to deal with, a detailed autopsy report written by Dr. Hall in connection with a murder case in 1778 read in #1 of the online magazine Gammelbo Allehanda.
At his death Dr. Hall's bequeathment includes a collection of manuscripts that systematically described fungi with accompanying drawings.
He also had a number of rare banknotes, one of Stockholm Banco 50 daler sm (silver coin) from the year of 1666.