If Thucydides is justly accounted the first political historian, Ari may be fitly styled the first of scientific historians.
Another question of great interest, which can only be touched upon here and may fitly close the consideration of this division of the Vegetable Kingdom, concerns the evidence as to the derivation of higher groups from the Pteridophyta.
Such work can only fitly be entrusted to a few, and whenever difficult circumstances arise it is necessary that the action of those few be kept in harmony by the predominance of one.
His editions of Icelandic classics (1858-68), Biskopa Sogur, Bardar Saga, Forn Sbgur (with Mobius), Eyrbyggia Saga and Flateyar-bok (with Unger) opened a new era of Icelandic scholarship, and can only fitly be compared to the Rolls Series editions of chronicles by Dr Stubbs for the interest and value of their prefaces and texts.
Such a task can be fitly undertaken by Apollo, since he himself underwent purification after slaying Python.