I have not heard from Robert for a long time but he did give me a copy of his transcript.
The only reference I can find is an Extract from William Woon’s Journal - A Wesleyan Missionary’s Journey from England to New Zealand during 1830 to 1859, transcribed by Robert L. Horrocks from a copy held in the Horrock's Family and I believe he presented a copy to the Whanganui Library.
Page 21 of 668, line 5
Nov. 15th 1830
Died on board this ship (The Lloyd's of London) last night at 12 o'clock, one of the New Zealanders named Ata, who (with his uncle Fredee) was on his way to the abovementioned place from England. This young man and his uncle were stolen away from N.Z. Some time since by an English sailor, and brought to the British shores for an exhibition. Having been in England some time they were at length rescued from his hands by some friends at Derby who placed them under the care of myself and brethren that he might see them safe home again. Poor Ata was ill some time in England and his friends were of opinion that his native air only would restore him to health. But he died last night after much suffering, to live we trust in another and happier world. He knew something of the plan of salvation, and we trust that his faith in Xt: and sincerity of heart were acceptable to God. His remains were committed to the deep this morning about ½ past 11 in the presence of the whole crew. I commenced the service by singing a hymn, and Mr Watkin read the burial
service. His Uncle and some of the men were deeply affected. Yesterday we had service 3 times. Mr Watkin preached in the morning from the narrative of Dives and Lazarus 16th of Luke. A very interesting and profitable discourse. In the afternoon we had a class meeting. And in the evening improved Jonah's message to the Ninevites. We have great encouragement in our work. May the Lord make us eminently useful.
There is no mention of the uncle's death. I hope this helps but I am sure you will hear from the many other Woon researchers in New Zealand.
Good luck,
Heather