William George Cusins, A Dictionary of Music and Musicians (1900)
“ The fourth piece was the great Stabat Mater, composed for S.S.A.T.T.B., accompanied by 2 violins, 3 altos, cello and organo, and undoubtedly one of the finest works of any composer of the period immediately preceding that of the giants Bach and Handel. His great contemporaries Alessandro Scarlatti and Purcell produced nothing finer. No exact dates can be assigned to these four works, but they all belong to his later manner. In Steffani is to be found the perfection of counterpoint without stiffness, and with that real sign of genius, exhaustless variety. ”
