On the Farnborough to Oz flight she went from Farnborough to Merville (stopped for a while) and then flew on to Charleville.
Two relatively short hops (roughly 135nm and then 95nm). The first leg we know she did solo as there is video of her leaving Farnborough. Did she wait at Merville to pick up Ewald before flying on to Charleville?
Maybe someone knows just where he joined the flight. Seems odd that she did not do this in 1 hop as it is well within the range of the Stearman.
Uni Update. Spoke to them today, I have been assured of a written response tomorrow.