Annabella died of diptheria aged 15.

Name, month and year of birth (September 1845) and date of death from reliable information (CB/January 2002) collected by Brian Oliver of nzolivers.com (b.1950) on his April 2008 visit to Devon.

However, information which David Eric Lloyd (born 15 Feb 1943) gleaned from the New Plymouth archives from the Registry of Baptisms Wesleyan suggests a birth date of 17 August 1845, baptism of 19 October 1845. Date of death is the same. David confirms Annabella died of diptheria as per the Taranaki Herald of 4th May 1681.

Place of birth and burial from Clarence (Clarry) George Oliver b. 09 Sep 1928.

From Brian (of nzolivers.com) trip to New Plymouth February 2009, the Headstone at Te Henui Cemetery, New Plymouth, New Zealand:
In
Memory of John Oliver
Who died April 11th 1861
Aged 14 Years
Also in memory of
Anabella Oliver
Who died April 28th 1861
Aged 16 Years
He shall gather the lambs with
his arm, and carry them in his bosom