The recipient might become worried if successive letters then come threatening that action will be taken to obtain the price from him.

One was that some members of the public were unaware that they need not pay and gave in to the pressure of successive threatening letters.

The lettered naming system is a standard in the hobby in which successive letters double the delivered impulse of the previous letter.

As each candidate string is generated, its successive letters are tested for existence in the tree.

In the first line of text that follows the monogram, the letters are hollow-shafted and each successive letter is smaller than the previous.

Each year his office assigns successive letters of the alphabet to each comet discovery.

There are several digraphs (successive letters used to represent a single sound):

To enter two successive letters that are on the same key, the user must either pause or hit a "next" button.

Each successive letter of the message is written in a single square.

The Commission received 18 successive letters from the plaintiff in relation to the project.