"Give them here," said Holmes. "Now, Doctor," turning to me,
"are those ordinary pills?"

They certainly were not. They were of a pearly grey colour,
small, round, and almost transparent against the light.
"From their lightness and transparency, I should imagine that
they are soluble in water," I remarked.

"Precisely so," answered Holmes. "Now would you mind going
down and fetching that poor little devil of a terrier which
has been bad so long, and which the landlady wanted you to
put out of its pain yesterday."

I went downstairs and carried the dog upstair in my arms.
It's laboured breathing and glazing eye showed that it was
not far from its end. Indeed, its snow-white muzzle
proclaimed that it had already exceeded the usual term of
canine existence. I placed it upon a cushion on the rug.

"I will now cut one of these pills in two," said Holmes,
and drawing his penknife he suited the action to the word.
"One half we return into the box for future purposes.
The other half I will place in this wine glass, in which
is a teaspoonful of water. You perceive that our friend,
the Doctor, is right, and that it readily dissolves."

"This may be very interesting," said Lestrade, in the injured
tone of one who suspects that he is being laughed at,
"I cannot see, however, what it has to do with the death of