Read it through once

In crossing the bridge, she dropped the door key in the river. Arriving at the cathedral some few minutes before her escort, and waiting there, she thought, what if the key were already taken in a net, what if it were identified, what if the door were opened and the remains discovered, what if she were stopped at the gate, sent to prison, and charged with murder! In the midst of these fluttering thoughts, the escort appeared, took her in, and took her away.