Lost letter returns on five topics from urban waterfront, and smaller rural communities.

Of 850 letters "lost" in Florida, 339 (39.9%) were returned in the mail and indicated across 5 addressees, 2 sizes of community, and 2 destinations, community size and addressees' affiliations were associated with returned responses, but not destinations. These findings seem to indicate that there was no bias in the willingness of people to help some strangers with a mailing address in another Florida county. The similarities of our findings with other measures of public response were discussed.