Cauda-de-andorinha (Papilio machaon)
«The other day I was nearly arrested by two excited policemen in a wood in Yorkshire. I was on a holiday, and was engaged in that rich and intrincate mass of pleasures, duties, and discoveries which for the keeping off of the profane we desguise by the exoteric name of Nothing. At the moment in question I was throwing a big Swedish knife at a tree, practising (alas, without success) that useful trick of knife-throwing by which men murder each other in Stevenson's romances.
Suddenly the forest was full of two policemen; there was something about their appearance in and relation to the greenwood that reminded me, I know not how, of some happy Elizabethan comedy. They asked what the knife was, who was I, why I was throwing it, what my address was, trade, religion, opinions on the Japanese war, name of favourite cat, and so on. They also said I was damaging the tree; which was, I am sorry to say, not true, because I could not hit it. The peculiar philosophical importance, however, of the incident was this. After some half-hour's animated conversation, the exhibition of an envelope, an unfinished poem, which was read with great care, and, I trust, with some profit, and one or two other subtle detective strokes, the elder of the two knights became convinced that I really was what I professed to be, that I was a journalist, that I was on the Daily News (this was the real stroke; they were shaken with a terror common to all tyrants), that I lived in a particular place as stated, and that I was stopping with particular people in Yorkshire, who happened to be wealthy and well-known in the neighbourhood.
In fact the leading constable became so genial and complimentary at last that he ended up by representing himself as a reader of my work. And when that was said, everything was settled. They acquitted me and let me pass.
I was certainly accused of something which was either an offence or was not. I was let off because I proved I was a guest at a big house. The inference seems painfully clear; either it is not a proof of infamy to throw a knife about in a lonely wood, or else it is a proof of innocence to know a rich man.»
G. K. Chesterton, Some policemen and a moral (1904)