sealight

Those sealights have been explained by a diversity of causes ; but the singular brilliancy of the Red Sea seems owing to fish-spawn and animalculae, a conjecture which receives some corroboration from the circumstance that travellers who mention it visited the gulf during the spawning period, — that is, between the latter end of December and the end of February.

When we had crossed from Gaul, guided by the lofty sealight of Dubrae (Dover, if you will), our mariners cast anchor under the massive walls of the citadel of Rutupiae, chief port in our remote province of Britain, which is, in your tongue, Richborough, near Sanwich.