I once saw a worthy old missionary essay to shed some light on the subject; and though I understood but a few of the words employed, I could easily get at the meaning of his illustrations.
They were something like the following: "Here," says he, "you see this circle" (describing a large one on the ground with a stick); "very good; now you see this spot here" (marking a point in the perimeter): "well; this is Beretanee (England), and I'm going to sail round to Tahiti.

Here I go, then (following the circle round), and there goes the sun (snatching up another stick, and commissioning a bandy-legged native to travel round with it in a contrary direction).

Now then, we are both off, and both going away from each other; and here you see I have arrived at Tahiti (making a sudden stop); and look now where Bandy Legs is!" But the crowd strenuously maintained that Bandy Legs ought to be somewhere above them in the atmosphere; for it was a traditionary fact that the people from the Duff came ashore when the sun was high overhead.

And here the old gentleman, being a very good sort of man, doubtless, but no astronomer, was obliged to give up.
Arheetoo, the casuist alluded to, though a member of the church, and extremely conscientious about what Sabbath he kept, was more liberal in other matters.

Learning that I was something of a "mick-onaree" (in this sense, a man able to read, and cunning in the use of the pen), he desired the slight favour of my forging for him a set of papers; for which, he said, he would be much obliged, and give me a good dinner of roast pig and Indian turnip in the bargain.
Now, Arheetoo was one of those who board the shipping for their washing; and the competition being very great (the proudest chiefs not disdaining to solicit custom in person, though the work is done by their dependants), he had decided upon a course suggested by a knowing sailor, a friend of his.