Read it through once

The telegram which we eventually received came late one night just as I was thinking of turning in and Holmes was settling down to one of those all-night chemical researches which he frequently indulged in, when I would leave him stooping over a retort and a test-tube at night and find him in the same position when I came down to breakfast in the morning. He opened the yellow envelope, and then, glancing at the message, threw it across to me.