The above family picnic was around the Auckland area about 1899. Looking at the photo on the left of the picture including the young bloke by the tree the forth person is Isaac Clough.
The two woman next to him on his left could be Margaret his sister and next to her could be his other sister Elinor.
I cannot recognise his parents but the bloke up the tree at the back could be John Cooke Clough and his mother could be 3rd on his left or even forth.
His wife Elizabeth is fifth on his left in the white blouse and hat centre of the picture, and his other sister Annie Merrick is second on the left from Elizabeth. Annie's husband Samuel Merrick is on her left with hands on his knee. I cannot make out the Clough children but they are probably in the front around the boys kneeling and the Merrick kids are in front of Samuel.
If anyone can put anymore light on this photo please get in touch.