He was a Fellow of the Society of Antiquaries of London and in 1768 was elected a Fellow of the Royal Society as a "Rector of Buckland in Hertfordshire, Author of the Greek Thesaurus lately published, and Fellow of the Society of Antiquaries of London, a Gentleman well skilled in Natural History and every branch of Polite Literature".[4][5]
He was appointed Garrison Chaplain at Portsmouth barracks in 1775.
Morell wrote the longest and most detailed surviving account of collaboration with Handel.[6]
He died in 1784 and was buried in Chiswick, London.
Librettos
He is best known as the librettist of the following of George Frideric Handel's oratorios: