Further, Jerry’s own hearing was trained to still greater acuteness.  Hours at a time, sitting by Nalasu or standing apart from him, he was taught to catch the slightest sounds or rustlings from the bush.  Still further, he was taught to differentiate between the bush noises and between the ways he growled warnings to Nalasu.  If a rustle took place that Jerry identified as a pig or a chicken, he did not growl at all.  If he did not identify the noise, he growled fairly softly.  But if the noise were made by a man or boy who moved softly and therefore suspiciously, Jerry learned to growl loudly; if the noise were loud and careless, then Jerry’s growl was soft.

It never entered Jerry’s mind to question why he was taught all this.  He merely did it because it was this latest master’s desire that he should.  All this, and much more, at a cost of interminable time and patience, Nalasu taught him, and much more he taught him, increasing his vocabulary so that, at a distance, they could hold quick and sharply definite conversations.

Thus, at fifty feet away, Jerry would “Whuff!” softly the information that there was a noise he did not know; and Nalasu, with different sibilances, would hiss to him to stand still, to whuff more softly, or to keep silent, or to come to him noiselessly, or to go into the bush and investigate the source of the strange noise, or, barking loudly, to rush and attack it.

Perhaps, if from the opposite direction Nalasu’s sharp ears alone caught a strange sound, he would ask Jerry if he had heard it.  And Jerry, alert to his toes to listen, by an alteration in the quantity or quality of his whuff, would tell Nalasu that he did not hear; next, that he did hear; and, perhaps finally, that it was a strange dog, or a wood-rat, or a man, or a boy—­all in the softest of sounds that were scarcely more than breath-exhalations, all monosyllables, a veritable shorthand of speech.

Nalasu was a strange old man.  He lived by himself in a small grass house on the edge of the village.  The nearest house was quite a distance away, while his own stood in a clearing in the thick jungle which approached no where nearer than sixty feet.  Also, this cleared space he kept continually free from the fast-growing vegetation.  Apparently he had no friends.  At least no visitors ever came to his dwelling.  Years had passed since he discouraged the last.  Further, he had no kindred.  His wife was long since dead, and his three sons, not yet married, in a foray behind the bounds of Somo had lost their heads in the jungle runways of the higher hills and been devoured by their bushman slayers.

For a blind man he was very busy.  He asked favour of no one and was self-supporting.  In his house-clearing he grew yams, sweet potatoes, and taro.  In another clearing—­because it was his policy to have no trees close to his house—­he had plantains, bananas, and half a dozen coconut palms.  Fruits and vegetables he exchanged down in the village for meat and fish and tobacco.