In May 1958 a state of emergency was declared and there were a number of bombings until the arrest of the principal instigators in July.

Mr. Yousef, who is missing, was a principal instigator, they say, and the one who supervised the building of the bomb.

Hone Heke is considered the principal instigator of the Flagstaff War.

"We will now take up the case of one of the principal instigators of Royal murder and governmental decay."

"Did you know that your employer, Mr. Ratchett, was the principal instigator in that affair?"

The Athenians soon came to regret their decision in the case of the generals, and charges were brought against the principal instigators of the executions.

The authorities, fearing another outbreak of violence, suspected that the principal instigator was Marlowe himself.

Obediah Jennings was the principal instigator in the deputy's death, the elder Bowman told Markham.

The Dauphin was pointed out as the principal instigator of the assassination of the Duke of Burgundy.

Japan, desperately seeking ways to soften the impact of the rising yen on its economy, was the principal instigator.