Sprinkle gelatin on hot coffee. Stir to dissolve. Add sugar, salt, and yolks.
Heat over low heat if necessary to dissolve solids. DON'T BOIL. OFF HEAT.
Add liquors, chill until mixture "mounds" slightly.
Beat egg whites to soft peaks, add sugar. Beat to stiff peaks.
Separately, whip cream. Fold together with beaten whites. Fold all into coffee mixture. Pour into shells, chill or freeze.