Police discovered several letter bombs hidden among the mail, prompting an immediate investigation.

In the spelling bee, contestants were asked to identify words that contained double letters.

During the final review, several drop letters went unnoticed, causing the contract clause to become ambiguous.

The company sent circular letters to all employees announcing the new remote work policy.

The charity used form letters to acknowledge each donation, but volunteers personalized many of them.

The bishop distributed pastoral letters to guide the faithful through the crisis.

The archive contained dozens of ship letters describing daily life at sea.

Scholars debated whether the Stephanus letters could be authentic or later forgeries.

When annotating the equation, she used superior letters to denote the isotopes.

She keeps all her Sunday letters in a small wooden box on the shelf.