John Weeks Moore, Complete Encyclopaedia of Music… (1880)
“ Barnett, John, is the eldest son of Mr. Barnett Barnett, a respectable jeweller and diamond merchant, residing in London ; he was born at Bedford in 1802. When only two years of age, he discovered so strong a genius for music, that he could, after once having heard an air, sing it with an exactness truly astonishing ”
