Thanks for your replies. I have just spent a couple of hours looking at Trove, though I missed that last one as I set it for 1855-1857, when the ship left for home. I also removed the word Fremantle, as it brought up a lot of false trails! The UK newspapers were quite right about the opinions being expressed in Sydney.
Apart from that aspect, I was looking for reports of what the ship was doing during those years - I picked up a few bits, mainly arrivals and departures. Now to try and collate it all!