I assert nothing.

As to the escape from the pavilion--that's another thing, the most natural thing in the world." For a moment Frederic Larsan paused,--a moment that appeared to us a very long time.

The eagerness with which we awaited what he was going to tell us may be imagined.
"I have not been in The Yellow Room," he continued, "but I take it for granted that you have satisfied yourselves that he could have left the room only by way of the door; it is by the door, then, that the murderer made his way out.

At what time?
At the moment when it was most easy for him to do so; at the moment when it became most explainable--so completely explainable that there can be no other explanation.

Let us go over the moments which followed after the crime had been committed.
There was the first moment, when Monsieur Stangerson and Daddy Jacques were close to the door, ready to bar the way.