The excluded letters (in parentheses in the list below) spell
INSIDE OUT and appear outside the grid, as shown above.

May Puzzle Solvers
(The first ten are listed in the order their solutions were received, the others alphabetically)

1. Stan Francuz – Somewhere in Australia
2. Judy Adamski – Jenison, MI
3. Stan Kurzban – Chappaqua, NY
4. Henry Cook – Chicago, IL
5. Dina Fertig – Cherry Hill, NJ
6. Mark Navarrete – Quezon City, the Philippines
7. Jim Christenson – Port Townsend, WA
8. Daniel J. Milton – Vienna, VA
9. Rick Kasten – Alexandria, VA
10. Darreby Ambler – Bath, ME

Dale Ashworth – San Francisco, CA
Albin Avgher – Baltimore, MD
Al Backiel – Ridgewood, NJ
Robert Brown – Albuquerque, NM
Cathy Childs – Pompano Beach, FL
Eric Chipman – Boulder, CO
Norman W. Davis – Englewood, NJ
David Durfee – Bennington, VT
Keith and Elizabeth Falkner – Sarasota, FL
Barbara Featherston – St. Louis, MO
Joe Fendel - Berkeley, CA
William Flis – Philadelphia, PA
Lewis Gee – Poway, CA
Michael N. Geselowitz – Cedarhurst, NY
Steve Gunter – Raleigh, NC
Wayne Jones – Worcester, NY
Dave Kaplan – New City, NY
Mike Lessie – Douglassvile, PA
Richard Letourneau – Bonita Springs, FL
Paul Lustig – Lakewood, OH
Bob Mattson – Smithtown, NY
Allan Mayoff – San Felipe, Baja Norte, Mexico
Jackie Miller – Everett, MA
Mary Lyndal Nyberg – Manhattan, KS
Priscilla Olson – Framingham, MA
Huw Powell – Lee, NH
Charlie Pritzlaff – Silver Spring, MD
Charles Ray – Harare, Zimbabwe
Arnold Reich – Bronxville, NY
Ned Robert – Los Gatos, CA
Charles J. Rohrmann, Jr. – Scarsdale, NY
Mordy Rosen – Berkeley, CA
Dexter Senft – Bedford, NY
Arthur Schless – Unionville, PA
Callie and Bob Smith – Massena, NY
Ashutosh Sodhani – Indore, MP, India
Donald Stanley – Littleton, CO
Steve Tice – Great Falls, VA
Margaret Webster – Medford, MA
Thomas Wilson – South Williamsport, PA
Jay Winter – Farmington Hills, MI