WASHINGTON, D.C.: The White House aide who found Hillary Clinton's long-lost Whitewater billing records two years after they were subpoenaed, testified that they turned up unexpectedly last August in a room next to Mrs. Clinton's office in the family residence, but that she did not know they were important at the time. Carolyn Huber, who worked for the Rose law firm before coming to Washington, told the Senate Whitewater Committee Thursday she believed at the time that the papers had been left for her to file. Huber testified that she put the papers in a box without looking them over, then forgot about them until a couple of weeks ago. Recognizing Mrs. Clinton's Whitewater billing records, she said she delivered them immediately to David Kendall, the First Lady's lawyer. Republicans weren't buying. Long suspicious that the Clinton's knew the whereabouts of the records, and that they may have arranged for their removal from the late Vincent Foster's office the night he committed suicide, Senator Alfonse D'Amato announced he might solicit written explanations from the Clintons. Sen. Lauch Faircloth charged they "likely have a very serious case of obstruction of justice." Slow down, said Democratic counsel Richard Ben-Veniste, reminding his colleagues that obstruction of justice is "not a term to throw around," though he acknowledged the committee should look into "whether there were any shenanigans."