Suddenly he stopped, then turned about, and came stumbling back, screaming in a great panic, "No, it's a bear, a big black one!" and hid his face in Nan's skirts.
For a moment Nan quailed; ever her courage gave out at the thought of a real bear, and she was about to turn and flee in great disorder, when a mild "Moo!" changed her fear to merriment, as she said, laughing, "It's a cow, Robby! the nice, black cow we saw this afternoon." The cow seemed to feel that it was not just the thing to meet two little people in her pasture after dark, and the amiable beast paused to inquire into the case.

She let them stroke her, and stood regarding them with her soft eyes so mildly, that Nan, who feared no animal but a bear, was fired with a desire to milk her.
"Silas taught me how; and berries and milk would be so nice," she said, emptying the contents of her pail into her hat, and boldly beginning her new task, while Rob stood by and repeated, at her command, the poem from Mother Goose: "Cushy cow, bonny, let down your milk, Let down your milk to me, And I will give you a gown of silk, A gown of silk and a silver tee." But the immortal rhyme had little effect, for the benevolent cow had already been milked, and had only half a gill to give the thirsty children.
"Shoo! get away! you are an old cross patch," cried Nan, ungratefully, as she gave up the attempt in despair; and poor Molly walked on with a gentle gurgle of surprise and reproof.
"Each can have a sip, and then we must take a walk.

We shall go to sleep if we don't; and lost people mustn't sleep.

Don't you know how Hannah Lee in the pretty story slept under the snow and died ?" "But there isn't any snow now, and it's nice and warm," said Rob, who was not blessed with as lively a fancy as Nan.
"No matter, we will poke about a little, and call some more; and then, if nobody comes, we will hide under the bushes, like Hop-'o-my-thumb and his brothers." It was a very short walk, however, for Rob was so sleepy he could not get on, and tumbled down so often that Nan entirely lost patience, being half distracted by the responsibility she had taken upon herself.
"If you tumble down again, I'll shake you," she said, lifting the poor little man up very kindly as she spoke, for Nan's bark was much worse than her bite.
"Please don't.

It's my boots they keep slipping so;" and Rob manfully checked the sob just ready to break out, adding, with a plaintive patience that touched Nan's heart, "If the skeeters didn't bite me so, I could go to sleep till Marmar comes." "Put your head on my lap, and I'll cover you up with my apron; I'm not afraid of the night," said Nan, sitting down and trying to persuade herself that she did not mind the shadow nor the mysterious rustlings all about her.
"Wake me up when she comes," said rob, and was fast asleep in five minutes with his head in Nan's lap under the pinafore.
The little girl sat for some fifteen minutes, staring about her with anxious eyes, and feeling as if each second was an hour.