A familiar-looking messenger has been roaming the halls of Congress lately. It's Steve Gobie, the former prostitute whose connections to Barney Frank caused the Massachusetts representative so much trouble. Gobie now makes deliveries for a private courier service, and his rounds often take him to the Capitol, according to the upcoming issue of the Hill newspaper Roll Call. Gobie told a sharp-eyed member of the press corps that he has delivered packages to about 30 congressional offices without being recognized, and said that "coming into this building certainly brings back memories." He said he's even passed ranking House ethics committee member John Myers (R-Ind.) in the hall unnoticed. Moore Sculpture Leaving Baltimore

The huge Henry Moore sculpture "Reclining Connected Forms," which has been on display in the lobby of the Baltimore Convention Center for the past 10 years, is apparently on its way to Paris. The 50-ton black marble piece was sold at auction at Sotheby's New York in May for $2.2 million to unknown buyers across the Atlantic, but the sale was only recently announced by Fred Lazarus IV, president of the Maryland Institute College of Art, which owned the work. The sculpture, also known as "Conception," was given to the Maryland Institute in 1980 by the USF&G Corp., which commissioned it in the early '70s for a reported six-figure sum. It had been on loan to the Convention Center. Lazarus said the decision to sell the piece was made last fall by the school's board of directors, which had concluded that "for the college to remain competitive, it had to use its assets effectively." Arm Surgery for Charles

Britain's Prince Charles will have surgery today on his right arm, fractured in two places two months ago while he was playing polo. One of the fractures has healed, but the other has not, so doctors will remove a small portion of bone from the prince's hip and implant it near his elbow. Surgeons said the procedure is a common one to help bones heal and they expect the arm to return to normal except for a "stiffish elbow."

Since Charles will be hospitalized for a week, he will miss the opening this weekend of an exhibit of his artwork in Salisbury, 80 miles west of London. Fifty watercolors and lithographs will go on display and sale to benefit a trust that is trying to raise $12 million to repair the 730-year-old Salisbury Cathedral. The preservation of the cathedral, famous for its enormous spire, has long been a pet project of the prince, who is president of the trust. Tribute to Stevie Ray

More than 2,000 fans and musicians weathered 100-degree heat yesterday in Dallas to mourn the death of that city's favorite son, blues guitarist Stevie Ray Vaughan, killed Monday in a helicopter crash. Bonnie Raitt led a chorus of "Amazing Grace," joined by fellow musicians including Phil Collins, Stevie Wonder and Vaughan's older brother, Jimmie Vaughan. "The Texas style of music has lost a great ambassador," said Wonder.