A senior Democratic official confirms to Fox:
Sen. Robert Byrd will lie in repose from 10am to 4pm on Thursday - closed casket -- in the Senate chamber. The Chaplain will give a prayer at 10:30am, which is when they will ask people to be here.
The funeral will be on Friday in WV, starting around 11am.
This was done quite frequently years ago. According to the Senate Historian's office, the last such observation was in 1959, ironically the first year Byrd was to start his more than half century of service.