Announcing examination for substitute clerk and substitute carrier in post office service in Maryland as listed below, Bladensburg, Brentwood, Clinton (substitute clerk only), Gaithersburg, Hyattsville, Kensington, Mount Rainier, Riverdale, Rockville, Sandy Spring (substitute clerk only), $1.61½ an hour, Branchville (substitute clerk only), Cabin John (substitute clerk only), Garrett Park (substitute clerk only), Olney (substitute clerk only), $1.36½ an hour, announcement 33 (local).