letter
noun
a written or printed communication addressed to a person or organization and usually transmitted by mail.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
David flung down the pen with which he had been lettering his books on the table, and, drawing a chair up to the fire, he sat moodily staring into the embers.
From The History of David Grieve by Mrs. Humphry Ward