Now I have a question at hand; in one place he is not afraid, and around the trap he is afraid. Now, how does he know when to be afraid and when not? I think because when he sees a piece of bait in a new place it is not natural.
Once last winter I knew where there was a dead horse and I used to go by it, and one day my brother was with me, and of course he knew that I could get a fox there, so to please him I set a trap, and not another fox came near. Well, I smoked that trap, boiled it in hemlock and then smeared it in tallow, but the fox knew and never came within ten feet of it again, when they were coming every night before. When I went by there before I set the trap I left as much scent as after, and how could he tell when there was a foot of snow blown there by the wind after I set my trap?
Now they don't appear to be afraid of human scent or iron in some places and around a trap they are, so now why should they know where to be shy? Well, because it may be in an unnatural place, but what tells him it is in an unnatural place unless it is instinct or good sharp sense.
As for scent, I know that rotten eggs and onions are natural, although the matrix of the female fox in the running season is very good scent; also skunk or muskrat scent or decayed fish, as it gives out a strong smell.
THE INSIDE OF NORTHERN TRAPPER'S CABIN.
One word to the novice fox trapper. You must make things look and smell natural around the spring, and put before them the food which God has provided for them, and you will have success. Place the trap in the mud of the spring, and a sod on the pan of the trap. Use one that has not been handled by the hand of a human being.
I will give some facts on human scent and human signs in South Carolina. Now I have not trapped "ever since the Civil War"; I have never trapped "all kinds of fur bearers that inhabit the Rocky Mountains", but have trapped every fur-bearing animal of upper Carolina from muskrat to otter, writes an experienced trapper.
The mink and fox are the animals most trappers referred to, we have no foxes here to catch, therefore I am unable to say anything about Reynard. Mink in the Carolinas are not afraid of human scent any more than any other animals, but they are afraid of human signs in an unnatural place. It is a common thing to find mink tracks in my path where I visit my traps every day, they are made late in the afternoon. I have set my traps almost at night and have had a mink in them next morning. I used no scent or bait, and mink are very scarce here, too.