Haast accompanied Hochstetter on his journey to Drury a few days later so that he could assess the natural resources and attractions of Auckland as a place for German immigration. Also present on the trip were several of Hochstetter's fellow scientists as well as the explorer and surveyor
Charles Heaphy. The party pushed further south, interacting with local
Māori and journeying along part of the
Waikato River before returning to Auckland in early January 1859. Hochstetter's report on the Drury coalfield was well received and he was formally asked to conduct geological surveys of Auckland and later Nelson Province. His work with the
Novara expedition largely complete, he agreed to stay on in New Zealand for six months, although the Austrian government would pay his salary. Hochstetter, sometimes assisted by Haast, spent the first two months on geological expeditions in the immediate area around Auckland, for the most part examining extinct volcanic cones and a multitude of historic points of eruption. Hochstetter then turned his attention south, towards the Waikato area, and requested Haast join him. The Waikato, apart from a few roads and trails, was largely unknown—the expedition, which left Auckland on 7 March 1859, had to make its own maps on the journey south. In three months they travelled as far as
Lake Taupō and also went as far west as
Kāwhia Harbour and as far east as
Maketu in the
Bay of Plenty. Arriving back in Auckland on 24 May 1859, the party, which included a photographer, had covered 1000 kilometres. Numerous collected samples, sketches and photographs taken on the journey added to the scientific knowledge of the area. It was revealed to the citizens of Auckland during a well attended public lecture delivered by Hochstetter on 24 June. At the end of their journey south Hochstetter had told a reporter from the
New Zealander that Haast had collected a great variety of statistical information to send home to Germany. It is likely however that Haast's main focus was on geography and geology. As Hochstetter adapted his technique in the study of a new country under adverse conditions, he later referred to Haast as his enthusiastic assistant, who not only helped but pushed him forward. At the same time Haast learnt a great deal from Hochstetter's great expertise. Hochstetter then tasked him with carrying out independent fieldwork in Golden Bay and with investigating the mineral deposits to the east of Nelson. At Shakespeare Bay, near present-day
Picton, he correctly predicted gold could be found based on his inspection of the rocks in the area. Haast returned to Nelson on 24 September 1859 and met up with Hochstetter, whose time in New Zealand was drawing to a close. Hochstetter delivered a public lecture, which included both his and Haast's geological findings, and his conclusion that the minerals in the area would contribute significantly to the wealth of the region was well received by the interested citizens of Nelson. While there Haast proposed that following on from his work in Nelson he could undertake a similar survey of Canterbury's portion of the West Coast. Haast's topographical and geological survey of south west Nelson took eight months, from January to August 1860. His report to the Nelson Provincial Council was published in early 1861 and of note were his discoveries of coal near the present-day town of
Westport. He also found that the coal seams discovered by
Thomas Brunner in 1848 were of a higher quality than first thought. He found gold in several tributaries of the Upper Buller, and reported on his botanical and zoological findings. ==Life in Canterbury==