See p. 194.
Marcellinus dwells upon the chopping seas which usually prevailed in the Straits; and of the rapid tide, which is also referred to by Ausonius (380), "Quum virides algas et rubra corallia nudat Aestus," etc.
To him is probably due the reconstruction of the "Vallum" as a defence against attacks from the south, such as the Scots were now able to deliver. See p. 207.