Name, date and place of birth and death from “Horneman Family History 1605 to 2006” CD, Chapter 8.0.

Peter Horneman advised Brian of nzolivers.com in 2/3 May 2017, that Henrietta out to New Zealand with her parents on the barque ‘Slains Castle’. They left Gravesend on the 22nd July 1852 and arrived at Otago on the 9th November 1852, after a good passage of 108 days. They arrived in Nelson on 3rd January 1853.
(Peter Horneman is the great-grandson of Emma Caroline Horneman b. 1836).

Notes, written by Frederick Edward Horneman in his Bible, were received in an email dated 20 May 2017 from Julie Bourke and include:

Our daughter Henrietta Laura Horneman was born at No. 4 Shrewsbury Cottage Holland Road Soughborough Road Brixton on Monday the 1st March 1847 at 25 minutes before 10 at night, in the Parish of Lambeth Surrey & was Registered on the 12 April 1847. She was Christened on the 9th June 1848 at St Marks Kennington by the Rev. Mr Etough.
Her Godfather was 1. Frederick Edward Horneman Esq Captain in Her Majesty’s Artillery Corps of London her Father.
Her Godmothers’ were
1. Mrs Laura Paulina Helder (born Thomas) wife of George Helder Esq of Rio de Janeiro
Her mother stood proxy for Mrs Helder Miss Katherine Mary Webb of Harleyford Place Kennington.
She is named Henrietta after # Captain His Royal Highness Prince Henry of the Netherlands RN the third son of His Majesty William the 2nd the present King of Holland, and Laura after Mrs Helder.

# since Vice-Admiral
Laura, was married at St Thomas’ Church Motueka on Wednesday 8th September 1869 to John Saxon Esq of Wai-Wero.

Result from marriage search on New Zealand BDM website in August 2022:
1869/6387. Bride: Henrietta Laura Horneman. Groom: John Saxon

Full date of marriage of 8 September 1869 confirmed from further searching in August 2022 on BDM Search by incrementally changing the date range for the marriage.

Marriage notice from Papers Past found in August 2022:
MARRIAGE.
Nelson Evening Mail, 13 September 1869
Saxon - Horneman. - September 8, at St Thomas's, Motueka, John Saxon, Esq., of Wai-Wero, to Henrietta Laura, third daughter of Major Horneman, J.P., Pangatotara.