Hello Diana,
I have just come across RootsChat for the first time, a link to this thread came up when I searched for the John Rennie. My ancestors on the John Rennie were George Henry Packman and his son George, they settled in Sydney. You have posted that you have a diary of the voyage written by your ancestor and I'd be very grateful if you're willing to share it with me or, if it's lodged in a library whether it's available publicly. I'm not quite sure how this forum works but hope to hear from you.
Kind regards,
Debra Sleith
Hi Ponies,
I am in Romford, England. This is where my ancestors lived before they made the journey by the John Rennie to Australia. So my ancestors are around Cootamundra way. It was my ancestor who wrote the diary. Speak soon,
Diana