Ah, yes that's the same Rainer. It's a trail I've followed before. Rainer and Barlow teamed up in Central Victoria, Aus. for a while -- 1860s. Met up in NZ at least once. They may have known each other from way back in England and America. They didn't arrive here together, however. Maybe there's a connection with Pell. Hmmm.
It all adds up to something. Hope I live long enough to sort it all out.
Cheers, Joy