He was impelled to speak in order not to remain silent, but did not know what to say, especially as his brother made no reply but only gazed fixedly at him, evidently trying to fathom the meaning of every word.
Hablaba por no callar, pero no sabía qué decin Su hermano no le respondía nada, mirándole con fijeza y esforzándose evidentemente en penetrar en el sentido de cada palabra.