68 
ME. G. J. ROMANES — EXPERIMENTS ON 
her manner was suggestive of great uncertainty whether or not 
she was on my track. 
9. — I walked the park in new shooting-hoots, which had never 
been worn by any one. The bitch wholly refused to take this 
trail. 
10. — I walked the park in my old shooting-boots, but having 
one layer of brown paper glued to their soles and sides. The 
bitch was led along my track, but paid no attention to it till she 
came to a place where, as I had previously observed, a small 
portion of the brown paper first became worn away at one of my 
heels. Here she immediately recognized my trail, and speedily 
followed it up, although the surface of shoe-leather which 
touched the ground was not more than a few square milli- 
metres. 
11. — I walked in my stocking-soles, trying first with new 
cotton socks. The bitch lazily followed the trail a short distance 
and then gave it up. I next tried woollen socks which I had 
worn all day, but the result was the same, and therefore quite 
different from that yielded by my shooting-boots, while more 
resembling that which was yielded by my bare feet. 
12. — I began to walk in my ordinary shootiug-boots, and when 
I had gone fifty yards, I kicked them off and carried them with 
me, while I continued to walk another three hundred yards in 
my stocking-soles ; then I took off my stockings, and walked 
another three hundred yards on my bare feet. On being 
taken to the beginning of this trail, or where I had started 
in my shooting-boots, the bitch as usual set off upon it at 
full speed, nor did she abate this speed throughout the whole 
distance. In other words, having been once started upon the 
familiar scent of my shooting-boots, she seemed to entertain no 
doubt that the scent of the stocking-soles and of the bare 
feet belonged to me ; although she did not clearly recognize them 
as belonging to me when they were not continuations of a track 
made by my shooting-boots (10 and 11). 
13. — I requested a gentleman who was calling at the house, 
and whom the bitch had never before seen, to accompany me in 
a conveyance along one of the carriage-drives. At a distance of 
several hundred yards from the house, I alighted in my shooting- 
boots, walked fifty yards beside the carriage, again entered it 
while my friend alighted and walked two hundred yards still 
further along the drive. The bitch ran the whole 250 yards at 
