of them.

It was the middle of the afternoon when I returned to the
laboratory with my slender budget of news. Craig was quite
interested in what I had to say, even pausing for a few moments in
his work to listen.

In several cages I saw that he had a number of little guinea-pigs.
One of them was plainly in distress, and Kennedy had been watching
him intently.

"It's strange," he remarked. "I had samples of material from six
ramekins. Five of them seem to have had no effect whatever. But if
the bit that I gave this fellow causes such distress, what would a
larger quantity do?"

"Then one of the ramekins was poisoned?" I questioned.

"I have discovered in it, as well as in the blood smear, the tox
albumin that Doctor Murray mentioned," he said, simply, pulling
out his watch. "It isn't late. I think I shall have to take a trip
out to Miss Hargrave's. We ought to do it in an hour and a half in
a car."

Kennedy said very little as we sped out over the Long Island roads
that led to the little colony of actors and actresses at Cedar
Grove. He seemed rather to be enjoying the chance to get away from
the city and turn over in his mind the various problems which the
case presented.