Dictionary of National Biography… (1904)
“ Being the eldest son of an earl he was known in all relations of life from the hour of his birth until his father's death as Lord Herbert. When the 'Sonnets,' with this dedication, were published in 1609, Pembroke's rank and dignity rendered it practically impossible that he should be deprived of those customary formalities of Herbert, William, 3rd Earl of Pembroke: address which played a prominent part in all dedications to him which are extant. ”
