EXPLANATION OF THE MAI’S. 
30 
sketched always on the spot, and in this manner I returned 
with materials from which I compiled in Auckland a map oi 
the Southern part of that Province, on a large scale. * 
This map has been re-cast and revised with the assistance ot 
my original sketches and surveys, by Dr. A. Petermanu, and 
the map in this Atlas, in the reduced scale, is the product ot 
his labour, and the result of my observations. It stands to 
reason, that a map which contains nearly 2,500 miles (10,000 
square miles) and embraces more than the fourth part ot the 
[Northern Island, executed by the assistance ot a compass 
alone, within the period of three months, can make no preten¬ 
sions to a trigonometric exactness. It is, however, the first 
map which gives a correct view of the rivers and mountain 
systems, and of the lakes in the interior of the Northern 
Island, and will be useful until some better and more complete 
map takes its place. The Barometrical measures which I took 
served as corresponding observations to those of the Obser¬ 
vatory of the [Royal Engineers in Auckland, which were kindly 
placed at my services by Colonel Mould. 
The geological condition of the Southern part of the Province 
of Auckland may be sketched in the following order 
PALAEOZOIC (pKIMABY) FOKMATIOH. 
Dark coloured claystone, old sandstone called grauwacke, 
silicious and jasparoid slate, form a complex system of layer 
►3 
# J\^_ copy of my original map, to the scale of 2 miles to 1 inch, re¬ 
mained in Auckland for the use of the Government. A second copy was 
sent to Mr. J. Arrowsmith, in London, to he used for the construction 
of a large Lew Zealand map in six parts, which that gentleman 
intended* to compile, with the understanding, however, that this 
map was to be used only as a provisional delineation of my observa¬ 
tions. The Geological map of the Province of Auckland, which was 
exhibited in the International Exhibition of London, in 1862, by 
Mr. Charles Heaphy, was entirely a copy and combination of my maps 
and surveys, without any acknowledgment of my authorship. Lne 
map, also, of the Isthmus of Auckland, given in the Quarterly Journal 
of the Geological Society of London, by Mr. Charles Heaphy, was pub¬ 
lished without my knowledge, and is a very incomplete copy of my obser¬ 
vations and maps, which were in Mr. Heapny s official charge. In this 
map that gentleman also introduced his own observations upon the 
Deoloo-ical formations of the neighbourhood of Auckland, made previous 
to my arrival in New Zealand, but without possessing even the most 
elementary knowledge necessary for making a Geological Survey. I have 
teIt it my duty to "make these remarks out of respect for truth and 
science. 
