Is there a mistake on the second diagram where prepare(1,e) is sent to Byzantium? Wonder if it should be prepare(1,a), since Athens hasn't learned the (1,e) val

Is there a mistake on the second diagram where prepare(1,e) is sent to Byzantium? Wonder if it should be prepare(1,a), since Athens hasn't learned the (1,e) value which only Ephesus and Delphi know about at that point? Otherwise I think it's a pretty good description of Paxos. I like that it walks through a good number of failure scenarios and mentions interesting corner cases such as a lack of an explicit commit in the original papers and that reading also needs to run the full Paxos algorithm.