You had better prepare a list of the guests before they leave.
They are sure to get away as fast as possible, and we may want to interview some of them later on.

Now we had better have a look at the body." They went upstairs to the bedroom.

There they found a young man, with a freckled face and a snub nose, packing up a photographic apparatus.

He was the photographer, and he had been taking photographs of the dead body.
"Finished ?" inquired Merrington.

"That's right.