The Blue Lagoon by H. De Vere Stacpoole

One day Dick climbed on to the tree above the house, and, driving Madame Koko off the nest upon which she was sitting, peeped in. There were several pale green eggs in it. He did not disturb them, but climbed down again, and the bird resumed her seat as if nothing had happened. Such an occurrence would have terrified a bird used to the ways of men, but here the birds were so fearless and so full of confidence that often they would follow Emmeline in the wood, flying from branch to branch, peering at her through the leaves, lighting quite close to her -- once, even, on her shoulder.

The days passed. Dick had lost his restlessness: his wish to wander had vanished. He had no reason to wander; perhaps that was the reason why. In all the broad earth he could not have found anything more desirable than what he had.