The jury in the cocaine and perjury case against D.C. Mayor Marion Barry yesterday completed its second day of deliberations after asking to see all the exhibits introduced during the six weeks of testimony and the full trial transcript.

Shortly after noon yesterday, U.S. District Judge Thomas Penfield Jackson granted the 12 jurors' request for the more than 100 exhibits introduced by both sides. Jackson also let them see the approximately 5,700 pages of transcripts.

At 2 p.m. yesterday, after four hours of deliberation, he allowed them to go back to their hotel and ordered them to return tomorrow.

Jackson allowed the jurors to spend much of their deliberation time yesterday examining the evidence displayed for them in the courtroom, instead of in the jury room. Deputy U.S. marshals blocked the two doorway windows into the courtroom and stood guard at each of the doors while the jury was inside.

It could not be determined yesterday whether the jury viewed any of the videotapes, including the tape of the Vista Hotel sting, that were introduced during the trial and included in the exhibits.

Barry is charged with three counts of lying to a grand jury, 10 counts of cocaine possession and one count of conspiracy to possess cocaine. Much of the testimony during the trial centered on one charge, Count 14, alleging that Barry possessed cocaine Jan. 18 at the Vista.

Sources close to the prosecution said Assistant U.S. Attorneys Judith E. Retchin and Richard W. Roberts were pleased with the impressions they believed were left by the government witnesses, including two key ones: Hazel Diane "Rasheeda" Moore, the former Barry girlfriend who lured him to the Vista sting, and former D.C. government employee Charles Lewis, whose testimony is crucial to the perjury charges.

At the end of the case, the usually stern-faced Retchin could be seen in the hallway outside the courtroom grinning broadly during several breaks in the testimony.

One source familiar with the government said Retchin and Roberts have said privately they fear a post-trial letdown, regardless of the verdict.

On the defense side, lawyer R. Kenneth Mundy said he expects no letdown because he must prepare to defend James E. Baugh, a codefendant of D.C. businessman John B. Clyburn, in an upcoming trial. Clyburn was acquitted last month in a bribery and conspiracy case.

Mundy privately has told associates that he hopes to win many of the 14 counts against Barry, or at least have a hung jury. Mundy publicly has said a hung jury would not be satisfactory.

The verdict could be delivered piecemeal. Last week, Jackson said the jury can return its verdict one or more counts at a time.

For the prosecution, there was considerable satisfaction at the end of the trial when Mundy acknowledged "occasional" cocaine use by Barry in the period covered by the indictment. Outside the courthouse, Barry turned aside reporters' questions about the validity of the lengthy government investigation in light of the acknowledgment by Mundy.

According to one source, there were lengthy discussions involving Roberts, Retchin, U.S. Attorney Jay B. Stephens and others about possibly exploiting Mundy's admission to argue that the government's efforts -- in particular the Vista sting -- were justified. In the end, the prosecutors decided against such an argument because it could have been interpreted as exhibiting some lingering defensiveness on the subject, a source said.

According to sources close to the investigation, government investigators and prosecutors always believed the Vista sting was the weakest count and the one they stood the greatest likelihood of losing because the public in general has an aversion to undercover operations.

But these sources said prosecutors felt compelled to go forward with the sting because before that, law enforcement had failed to gain the cooperation of Barry's close friends who allegedly used drugs with him. The sting, approved by Stephens, created an impression of momentum in building a case against Barry, and was used by investigators to persuade close Barry associates to come forward. Officials saw the sting as a risk, but a necessary one.

"We never thought we were going to win the Vista count," said one source close to the investigation. "But the best thing to do was to try to not let {those problems} flow over to the rest of the counts . . . . We wouldn't have to do the sting if people had come forward."

Mundy tried to heighten jurors' natural skepticism about stings by describing this one as a symbol of the government's uncontrollable urge to get Barry at any cost. The defense lawyer suggested to reporters that prosecutors gave him his strongest ammunition when they decided to prosecute the Vista count instead of having it dismissed.

"What would I have to complain about it?" he asked one afternoon.

But sources close to the investigation laughed when told that Mundy said he would not have raised the Vista operation had they decided to drop those charges and proceed on the other counts.

"He would eat us alive with that," said a source. "Can you imagine what he would say to the jury: 'Why didn't they show it? There must be something wrong.' We decided to put {the tape} in and take our lumps on it."

Other sources close to the investigation say they feel vindicated by Mundy's public admission for the first time that Barry was an occasional cocaine user because the admission proved law enforcement was on the right track by investigating Barry's drug use.

Barry campaigned throughout the city against drugs, and continually denied that he ever used cocaine. Prosecutors introduced videotapes of Barry making such statements, and those denials stood in contrast to Mundy's admission, and to witnesses who testified about approximately 200 instances of drug use by Barry.

In his closing statement to the jury, Roberts told the jurors that the government was not out to get Barry. Rather, Roberts said, Barry was out to get himself.

"There are no apologies for having conducted an investigation in which these crimes have been exposed, and Marion Barry's conduct has been exposed. Case closed," Roberts said.