Because nobody except tradesmen go to him, and they themselves do not know anything, but the sight of the sea.
Пояснення стосовно перекладу
* illo: dativus (singular) => translate with ‘to him’ but if you know the context of the sentence, translate with ‘to them’, because illo refers to the inhabitants of Britain ('genus hominum') ** you could also translate this with: "better than"