Top - printed in black - JOSIAH MARTIN, PHOTO, AUCKLAND. N.Z.
Bottom - hand written - Kauri Forest Gum diggers

Josiah Martin (1843–1916) was a New Zealand teacher and photographer. In 1879, he travelled to London and was introduced to rapid 'instantaneous' photography at the Royal College of Chemistry. Once he returned to New Zealand, he opened a studio in Auckland. Martin became well known for his topographical and ethnological photographs. He often presented these at the Auckland Photographic Club. Martins work was also published in the Auckland Weekly News, New Zealand Illustrated and exhibited photographs at the Pitt Rivers Museum at the University of Oxford.
Source - wikipedia.org