She took care to go out unobserved, lest Agatha should volunteer to walk with her, or Jane declare her intention of driving to the post office in the afternoon, and sulk for the rest of the day unless the trip to the village were postponed until then.

She took with her, as a protection against tramps, a big St.Bernard dog named Max.

This animal, which was young and enthusiastic, had taken a strong fancy to her, and had expressed it frankly and boisterously; and she, whose affections had been starved in her home and in society, had encouraged him with more kindness than she had ever shown to any human being.
In the village, having posted her letter, she turned towards a lane that led to the Riverside Road.

Max, unaware of her reason for choosing the longest way home, remonstrated by halting in the middle of the lane, wagging his tail rapidly, and uttering gruff barks.
"Don't be stupid, sir," said Gertrude impatiently.

"I am going this way." Max, apparently understanding, rushed after her, passed her, and disappeared in a cloud of dust raised by his effort to check himself when he had left her far enough behind.