Here is what I call the "Butterworth Letter".. I actually sent a copy to the Willunga Museum.. Bill Chalker was unaware of it too..
TO THE EDITOR OF THE "ADELAIDE OBSERVER."
Sir, having observed an extraordinary appearance in the western sky such as I never saw before, it may not be altogether uninteresting to your readers to know some particulars connected with it.
Towards the evening of Monday, the 14th February, I was passing by Mr. Martin's farm, when I was accosted by Mr. John Prouse, and asked whether I had seen those new planets, to which I replied I had not, Mr. Prouse then told me that-he would show me something that I had never seen before, and pointing in the direction of the sun, told me to look, which I did, and to my surprise, I discovered three dark objects suspended in the sky, in the direction of the sun, two of which appeared perpendicular, and apparently not far apart; the third standing on the right, toward the north, and appeared to be more remote. Since that day the air has not been in that magnetic state, in consequence of which those objects have become invisible. What those bodies are I cannot say; but I thought it passing strange to see three dark bodies suspended in the sky, in open day.
Sir, if you think the above of any interest to your readers, you can insert the same in your paper.
Your obedient servant,
Joseph Butterworth
Willunga, March 1st, 1848