New Ulster Gazette
Also known as New Zealand Government Gazette (Province of New Ulster)
Historical Background
Prior to 1846, "New Ulster" was a geographic designation for the North Island. The New Zealand Constitution Act of 1846 formally divided the colony into two distinct political provinces and Governor George Grey's subsequent boundary proclamation in March 1848 redefined New Ulster to cover only the upper portion of the North Island, specifically the area north of the Patea River mouth.
Like its southern counterpart, New Munster, the Province of New Ulster was separated from the central government, possessed its own seal, and was overseen by a Lieutenant-Governor appointed by the Governor-in-Chief. Because Governor Grey successfully lobbied London to suspend the democratic provisions of the 1846 Constitution Act, New Ulster was administered by an unelected executive council. In fact, the intended legislative council for New Ulster never met at all during the province's existence.
The province (and the Gazette) ceased to exist following the implementation of the New Zealand Constitution Act 1852. The New Ulster province was abolished and divided into Auckland Province, part of the Wellington Province and New Plymouth province (later Taranaki Province).
From 1853 the main New Zealand Gazette was published again.
Missing issues:
1848, No. 22
1853 (all issues)

Further reading
https://en.wikipedia.org/wiki/New_Ulster_Province
https://teara.govt.nz/en/colonial-and-provincial-government/page-1
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The short-lived province of New Ulster never had an established council building (in fact, the New Ulster Legislative Council never met). The Province was led by Lieutenant-Governor George Dean-Pitt, whose residence was a regency style villa (depicted) at the top of Greys Avenue, Auckland.
New Ulster Gazette Statistics
4
Years Covered
122
Issues Processed
662
Pages Transcribed
6,402
Names Identified
3,481
Unique Names
1,457
Named Officials
221
Unique Officials