Perception is a complex process which we cannot take for granted, as the following example will show. I quote from the book "Dendroglyphs of the Chatham Islands" by Christina Jefferson. The Moriori fishermen, now probably extinct as a people, were living on these islands before the Maori came, and they had a custom of carving human figures in the bark of living trees, drawings which Jefferson tried to save to the afterworld by carefully copying as much as possible.

 

"Some light was perhaps shed, one afternoon in Mrs. Martin's cottage, on the second group of human figures, those said by the islanders to represent definite individuals. After we had enjoyed a cup of tea, the old lady was shown a collection of sixty of these drawings. No remarks were made by me, no questions were asked by either of us and no suggestions were made.

 

She gave polite attention to them and remained remotely indifferent until we came to the one numbered 20, when her attitude changed and she showed interest and animation.

 

Treating this one and those that followed as if they represented persons known to her, she viewed them with much deference making precise remarks. At 20 she said, 'An important person,' at 21 with added emphasis, 'A very important person,' at 22, 'A lady,' at 23, 'Yes! I think that is a lady.

Number 24 did not please her very much and she just nodded slightly. At 25 she smiled:

These were people she seemed to know. She held up the drawings as we would do photographs, turning them this way and that to let the light fall on them from different angles.

 

At 26 she was indulgent and remarked, 'A pretty little thing,' at 27 she was somewhat rueful and shrugged lightly as much as to say, 'There are people like him in this world';

 

 

at 28 she was very pleased, seeming to regard the figures with affection and satisfaction as she said, 'Husband and wife.'

 

 

She considered 29, holding her head now on one side and then on the other, saying appreciatively and with real tenderness in her tones, A nice face, a very nice face."