I think a biographical dictionary.
Whittier had used symbolism and imagery of war in his poem "To William Lloyd Garrison" when he described the rural nature of the New England including its cultural atmosphere, as well as its religion. In addition, Whittier was among the most prominent poets wherein among his main subject was the American Civil War.
Can you post the actual question with the shown sentences?
Answer:
As soon as Shiro saw his master he ran to meet him, wagging his tail, and, seizing the end of his kimono, dragged him under a large yenoki tree. Here he began to dig very industriously with his paws, yelping with joy all the time. The old man, unable to understand what it all meant, stood looking on in bewilderment. But Shiro went on barking and digging with all his might.
Explanation:
I'm not too sure but the other parts in the story didn't seem like companionship to me, but in here the dog is helping the old man.