1.   At its most absurd it might mean that companies could be sued for sending letters to the wrong address.

2.   He made a short speech expressing his gratitude to all those who had sent him letters of support.

3.   I had sent the letter earlier in the week.

4.   I sent the letter to her work address.

5.   I would like to express my gratitude to all those who have sent me letters of support.

6.   It was a risk, sending a letter to my house.

7.   Mom sent a letter with all the latest news.

8.   Nor would he send them letters announcing their ouster.

9.   People of both sexes and from all walks of life sent letters and signed petitions in huge numbers.