A gunman entered a mansion on Newport's "Millionaires' Row" early yesterday, tied up eight persons, raped one and made off with more than $1 million in cash and jewelry, police said.

The gunman fled the Summer Wind Estate by taxi. A few hours later, police arrested Calvin R. Walker Jr., 29, of Queens, N.Y., in a Providence hotel room and recovered cash and jewelry, officers said.

Police refused to identify the people in the mansion. But officials at Newport Hospital said two persons, including the rape victim, were treated and released. The officials identified the second person as Dexter Coffin, 64.

Newport city officials said the home is owned by F. Stephen and James V. Serzan, who could not be reached for comment.

Among the items recovered at the Providence hotel were several gold-and-diamond brooches, a triple chain of pearls, other jewelry and cash, police said.

Walker was to be arraigned today on several felony counts, including first-degree sexual assault, burglary and robbery, police said.

The mansion, built in 1981 and valued at more than $350,000, is squeezed between two of Newport's most lavish "summer cottages" -- the Astors' Beechwood mansion and Marble House, built for William K. Vanderbilt.