Question

(18) the assassins were selected by drawing ____. (19) at first lincoln __ pinkerton’s reports. (20) lincoln was essentially smuggled through baltimore in a __. (21) the conspirators fled because they realized that their plot had been ____.

Explanation:

These are fill-in-the-blank questions about the 1861 Baltimore Plot to assassinate Abraham Lincoln, based on historical facts:

1. Question (18): The plotters planned to select assassins randomly from their group via a lottery.
2. Question (19): Initially, Lincoln doubted the credibility of Pinkerton's warnings about the plot.
3. Question (20): To avoid the plot, Lincoln was secretly moved through Baltimore in a sleeping car on a night train.
4. Question (21): When the conspirators learned their plot was discovered, they fled to avoid arrest.

Answer:

(18) lots (or a lottery)
(19) doubted (or was skeptical of)
(20) sleeping car (or locked railroad car/night train car)
(21) discovered (or foiled/exposed)