"...In our sail from Loch Tarbert to Rowdil, on June 1st, we saw several pairs of the bean goose, and procured specimens of the turnstone in full summer plumage, but I do not think they had begun to lay, for they were in flocks of four and five; and near Rowdil, the southern extremity of Harris, we were gratified by finding an eyrie of the peregrine falcon, containing four young birds. The old ones were too cautious..."
https://direcleit.blogspot.com/2011/02/some-account-of-people-of-st-kilda-and.html