He said we were on no account _______ the meeting before he came.
A) to have started
B) to start
With (A) it seems to me as if we had started the meeting without him even though he had said that we shouldn't do so.
With (B) it seems as if he had left instructions not to start the meeting without him and we haven't done so yet.
Please note that I'm not an English teacher, so let's wait for their opinions.