Bicycle Tag of bike

I don't use the net locate the tags,
only memory or clues in the pictures.
I fail miserably most of the time,
but the few positives give me a silly high.
There were too many apparent clues in the tag to resist a search.
I found a good read instead.
The begining is a good tease,
but the gem is page 3:
Holmes on a bicycle.
http://www.aallnet.org/sections/lhrb/lhrb-6-2.pdf
Enjoy.

What a find. I think I enjoyed the footnotes as much as the article! Thank you for posting.