It means that deep in his heart he wants us to follow Yellow Bird's advice to the end.

For he is sure that he knows what Yellow Bird meant by 'The Country Beyond.' It is the great big world outside the forests, a world so big that if need be we can put ourselves ten thousand miles away from the trails of the mounted police.

That is the thought which is urging him to the post to look for Breault." Her arms crept up to his neck, and in a little voice trembling with eagerness she said, "Roger, my bundle is ready.

I prepared it last night--and it is under the bed." He held her more closely.
"And you are willing to go with me--anywhere ?" "Yes, anywhere." "To the end of the earth ?" Her crumpled head nodded against his breast.
"And leave Father John ?" "Yes, for you.

But I think--sometime--he will come to us." Her fingers touched his cheek.
"And there must be forests, big, beautiful forests, in some other part of the world, Roger." "Or a desert, where they would never think of looking for us," he laughed happily.
"I'd love the desert, Roger." "Or an uninhabited island ?" Against him her head nodded again.
"I'd love life anywhere--WITH YOU." "Then--we'll go," he said, trying to speak very calmly in spite of the joy that was consuming him like a fire.