It is important to note that the stamp honors the Mississippi River, not the boat that is a modern icon of the river.

The post office expended a lot more than a penny’s worth of effort to try to find the addressee.

Colopex will host 116 frames of single-frame and multiframe exhibits.

Few dealers have the capital available to stock them in-depth, and few collectors are buying more than one stamp, one block or one pane for their collections.

Plenty of stamp products were available, including panes of stamps, digital color and black ink first-day covers, and framed enlarged pictures of the Eugenie Clark stamp.

One of the new items is a build-your-own cardboard microscope kit.

According to the U.S. Postal Service, the stamp illustrates artist Lynn Staley’s oil portrait of Graham based on a 1970s photograph.

Other issues going off sale include stamps celebrating Scooby-Doo, President George H.W. Bush, and Bugs Bunny.

Also this week, highlights from the May 4 first-day ceremony for the United States Eugenie Clark stamp, and an upbeat review of the new Scott online catalogs.

The show will feature 52 dealers, including representatives from the United States Postal Service and the United Nations Postal Administration.

The stamps under discussion are those issued to publicize the United States’ most recent once-every-10-years international stamp show.

The United States Postal Service launched the Nature of America stamp series April 6, 1999, with the pane of 10 33¢ Sonoran Desert stamps.

Delivering the mail was the most common theme for the April cartoon caption contest featuring the 1961 4¢ Fort Sumter commemorative in the Civil War Centennial issue.

Gripper cracks are a specific type of plate variety that results from stress on rotary press plates.

The anniversary celebration is scheduled for Sept. 17.

The nondenominated (58¢) Mighty Mississippi stamps feature photographs that each represent a different state along the river’s 2,340-mile length.

The show will feature at least 35 dealers and more than 375 frames of exhibits.

A panel of five judges picked 15-year-old Madison Grimm’s painting for the top honor from among 53 entries in this year’s National Junior Duck Stamp Art Contest.

Two commemorative stamps from 1969 and 1975 help define the term.

Specific issue dates for the stamps were not provided.