Could anyone help me with the first sentence of one of Pliny’s Letters (2.11.1):
Solet esse gaudio tibi, si quid acti est in senatu dignum ordine illo.
I understand the sense (“You are always happy whenever something happens in the senate that becomes the rank of its members.”) but am stumped by acti.
As far as i can make out, I think it is a genitive sg. masc./nom. of the past perfect participle of ago (ago → actum → acti), governed by quid. I’m used to clauses of si quid + the genitive of an adjective or substantive, but don’t really get how it can take a PPP like this. Nor can I find the correct passage in G&L that might help me. Then again, I might have parsed it incorrectly…
Any help?