A Hughesville man was killed when he lost control of his motorcycle, and in a separate accident just 90 minutes earlier, a 14-year-old La Plata boy was seriously injured when a car driven by a teenager hit him as he walked into the street, the Charles County sheriff's office said.

The teenage boy was taken to Children's Hospital in Washington on Tuesday after a 16-year-old girl driving a Chevrolet Cavalier hit him as he walked out of his driveway about 2:40 p.m. on the 7100 block of Glen Albin Road in La Plata, the sheriff's office said.

The boy's condition at the hospital could not be obtained because authorities did not release his name. The name of the teenage driver also was not released. No charges have been filed.

On the same day at 4:10 p.m., just a few miles from where the boy was hurt, William G. Wells, 71, was killed on Piney Church Road in La Plata as he drove his motorcycle home from visiting his mother at a nursing home in Waldorf.

The sheriff's office said he lost control "for unknown reasons" as he rode north on Piney Church Road. Police are still investigating the accident.

Wells retired from the Smithsonian Institution in 1988 after more than 30 years there as a supervisor in charge of building operations, said his wife of 52 years, Bette. He is survived by six children, 13 grandchildren and countless friends, his wife said.

"We've been given so many flowers and cards and food . . . I don't have room for it all," said Bette Wells, 70. "He was a wonderful person, kind and gentle."

William and Bette Wells grew up around the corner from each other in their neighborhood in Falls Church and were married after high school. They moved to Hughesville in 1985 "to get away from the crowds," Bette Wells said, and to facilitate William Wells's two favorite hobbies: hunting and fishing.

Since his retirement, Wells spent many of his days doing volunteer work for a local church and delivering meals to seniors.

"He did just about anything anyone ever asked him," Bette Wells said.