Links to dozens of forums and clue sites.

The Drew family of East Lyme, Connecticut, offer clues in New England states as well as Washington, DC, South Carolina, and Colorado.

British university student studying letterboxing for her dissertation asks visitors to answer a few questions on the activity.

Couple from Kensington, Connecticut describe activities in eleven states and the island of Aruba.

Bonnie and Betsey Sennott offer clues to their boxes in Massachusetts.

Anna and Paul offer clues to boxes in Connecticut, Massachusetts and Vermont.

Information about letterboxing in and around Nebraska. Includes clues and logs for local letterboxes, as well as some resources for letterboxing in general.

Ambitious family project placing letterboxes in each state, patterned after the US quarters series.

Mark and Sue's weblog of letterboxing events in New England.

Clues, views, and news including boxes from Team Psychokiwi, Judi, Linton, and the Bunny.

Radio host Linda Wertheimer and Thomas Johnston, an enthusiast in Washington, D.C., find a letterbox near the White House. [audio] (April 10, 2004)

Clues to boxes in Oklahoma City as well as New Mexico, Alabama, and Costa Rica.

Family and friends offer clues to letterboxes in New Jersey and Pennsylvania.

Personal page with clues for boxes placed throughout the western United States, as well as a few in Canada, Africa, and Central America. Also includes tips for improving the stamp quality.

Articles including getting started, outdoor ethics, and explanation of cryptic letterboxer codes. Also includes list of boxes found and clues for boxes placed in the northeastern region of the United States.

Clues to nearly 100 letterboxes that Silver Eagle has placed in North America, primarily in Texas.

A collection of information and clues relating to letterboxing, a hobby that combines hiking, art, orienteering and mystery in a treasure-hunt style activity.

Article on local letterboxing from chain of community newspapers near Washington, DC. (July 9, 2003)

Family offers clues for Pennsylvania, New York and other states.

Clues to letterboxes placed by twograysquirrels, mostly in Maryland and Virginia.

Database of clues to letterboxes in urban locations, primarily in Europe.

Clues for boxes placed primarily in Rhode Island, but a few in other states as well. Also includes logs of the movement of hitchhiker boxes, primarily in New England.

Article by Caroline Kettlewell describes her discovery of the activity. (July 12, 2002)

Michelle Spalding offers a history of letterboxing in England and the United States with bibliography.

Discussion group for the northeastern US.