The first priority was to save the train service. The state of Maryland did that. Then it was time to save the train station. Montgomery County and others have done that.

So, on Saturday at 10 a.m., a ceremony will be held to dedicate the restored 95-year-old station at the up county community of Dickerson, where commuters board and detrain from weekday commuter trains into and out of Washington on the Baltimore & Ohio Railroad line. The station is about a quarter of a mile east of the state Rte. 28 overpass.

In addition to local officials, participants will include Harry C. Meem Jr., 79, son of Dickerson's first station agent, who served from 1891 to 1906 and again from 1933 to 1939.

The restoration cost $60,000. B&O service over the line began in 1873 and Dickerson is one of three stations in Montgomery County that date from the 1800s. The others are Kensington, also built in 1891, and Gaithersburg, built in 1884. Right Ship, Wrong Name

Sometimes an error can elicit interesting information. Based on an inaccurate word from a source who now admits erring, Metro Scene reported recently on the name of a Chesapeake Bay steamboat named for a relative of Wallis Warfield Simpson, the late Duchess of Windsor.

Three readers who know steamboat history called attention to the error, a reference to a nonexistent "Governor Warfield." The vessel's correct name was the President Warfield, named for Solomon Warfield, the duchess' paternal uncle and president of the defunct Old Bay Line.

The sleek, white passenger-carrying craft, built for the Baltimore-Norfolk run, had a fascinating history. Launched in 1928, she often was chartered to a New York-Boston steamship line, became a troop transport in British waters during World War II and was retired in 1945.

In a last blaze of glory, she was sold through some deception to new owners who turned her into the storied Exodus 1947. A ship with a comfortable capacity of 450 sought to carry 4,554 Jewish immigrants into what was then Palestine. The British intercepted her at Haifa and returned the passengers to Europe. Exodus, the ex-President Warfield, was destroyed by fire in 1952 and the hulk was sold for scrap. Airport Parking Bargain

It always costs for non-VIPs to park in a Washington airport parking lot, right? Wrong. A Metro Scene reader got a freebie Thursday when he went to Dulles Airport to pick up his wife, arriving from Paris, and was told at the airline counter that she was arriving instead at National Airport.

Returning to his car and exiting the gate, the man surrendered his ticket and the money for the first hour of parking. No need to pay, the attendant said; he had stayed less than 20 minutes, and that was on the house. Recharging the Batteries

I'm taking some time off, so you won't be seeing Metro Scene for a while. Its return is scheduled after the Memorial Day weekend.