Haki Herewini Karaka, Service no. 812593, AKA Herewini James Clarke, AKA Selwyn Clarke.
The abovenamed appears on the 15th Reinforcements roll, under the name in which he enlisted, Haki Herewini Karaka, but his obituary/bio states that he arrived in Egypt with the 14th Reinforcements. He is listed on the J45-D45 Nominal Roll as Haki Herewini Karaka, and as having embarked with the 28 Maori Batallion.
I am not suggesting that the information you have is incorrect, but thought it fitting to advise you of this fact.
Details as they appear on the Nominal Roll: Karaka, Haki Herewini, Service No: 812593, Private, Maori Batallion, Single, Kaitaia, Farmhand, Pamapuria, R.D., Kaitaia, Mrs D Karaka, Pamapuria, R.D., Kaitaia (m).