A singular noun of multitude is sometimes joined to a plural verb; as
Pars puerorum philosophum secuti sunt,
Part of the boys followed the philosopher.
And so they would now, particularly if they saw one in costume.
Verbs impersonal have no nominative case before them, as
Tædet me Grammatices, I am weary of Grammar.
Pertæsum est Syntaxeos, I am quite sick of Syntax.
Mirificum visum est Socratem in gyrum saltantem videre,
It seemed wonderful to behold Socrates jumping Jim Crow.