Georg August Schweinfurth,
The heart of Africa, Vol. 1 (of 2…
(1873)
“ Difficult were the task to give any adequate description of the singing of the Bongo. It must suffice to say that it consists of a babbling recitative, which at one time suggests the yelping of a dog and at another the lowing of a cow, whilst it is broken ever and again by the gabbling of a string of words which are huddled up one into another. The commencement of a measure will always be with a lively air, and every one, without distinction of age or sex, will begin yelling, screeching, and bellowing with all their strength ”
