before now. It took longer, being out of the ordinary.' It was
the coffin of which she spoke. It had been out of the ordinary.
That could only mean that it had been made to some special
measurement. But why? Why? Then in an instant I remembered the
deep sides, and the little wasted figure at the bottom. Why so
large a coffin for so small a body? To leave room for another
body. Both would be buried under the one certificate. It had all
been so clear, if only my own sight had not been dimmed. At
eight the Lady Frances would be buried. Our one chance was to
stop the coffin before it left the house.

"It was a desperate chance that we might find her alive, but it
WAS a chance, as the result showed. These people had never, to
my knowledge, done a murder. They might shrink from actual
violence at the last. The could bury her with no sign of how she
met her end, and even if she were exhumed there was a chance for
them. I hoped that such considerations might prevail with them.
You can reconstruct the scene well enough. You saw the horrible
den upstairs, where the poor lady had been kept so long. They
rushed in and overpowered her with their chloroform, carried her
down, poured more into the coffin to insure against her waking,
and then screwed down the lid. A clever device, Watson. It is
new to me in the annals of crime. If our ex-missionary friends
escape the clutches of Lestrade, I shall expect to hear of some
brilliant incidents in their future career."