Read "The Mystery of the Hasty Arrow" by Anna Katharine Green online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
"If you will look carefully at this chart, and note where the various persons then in the museum were standing at the moment Correy shouted his alarm, you will see that of all upon whom suspicion can with any probability be attached there is but one who could have fulfilled the conditions of escape as just explained to you."
Stretching forth an impressive finger, Mr. Gryce pointed to a certain number on the chart outspread between him and the Chief Inspector.