A man who decided to search for his dog rather than jump from a window of his blazing home was hospitalized yesterday after Prince William County firefighters, making "aggressive" rescue attempts, located him on the second floor.

Rescue workers administered cardiopulmonary resuscitation to the man, who was not immediately identified, and took him to Prince William Hospital.

Robbie Good, 48, who lives near the house at 4525 Sudley Road near Catharpin, said he heard yells and saw thick black smoke billowing from the house before noticing the man at the window. He said he and his son made several attempts at coaxing the man--whom they called Charlie--from the second-floor window before firefighters arrived.

"I tried to get him to jump out the window, and he just wouldn't do it," Good said last night, watching the smoldering ruins of the house as inspectors from the fire marshal's office picked through debris. "He went back in to get his Jack Russell terrier, and he just disappeared into the smoke. I never saw him again."

Good said that the man lived in the small turn-of-the-century home with his wife and that the couple often took care of their young grandchild. Capt. Tim Keen, a fire and rescue spokesman, said there was no one else in the house at the time of the fire. There was no immediate word on the fate of the dog.

Keen said firefighters arrived at 4:39 p.m. and described rescue efforts initiated both outside and inside the burning house as "aggressive." He did not elaborate.

He said investigators had not yet determined the cause of the fire, which consumed much of the two rooms on the first floor and appeared to have severely damaged the roof. No other homes were affected by the blaze. Police closed Sudley Road from Route 15 to Sanders Lane while fighting the fire.

CAPTION: Prince William firefighter Cory Parker chops at the roof of a burning house. A man was hospitalized after he was rescued from the fire.