Here's what Mr Williams told FBI 11/23/63:
I think this may be coming very close to the truth, leaving out only
--------there
was somebody on the sixth floor, who told him to leave*
--------Messrs Jarman & Norman didn't join him until a good bit later
--------before that, he was in the company of at least one other employee (another black man) at the fifth-floor window (as seen by Mr Rowland)
*'seeing no one there' in the FBI report recalls the now notorious 'They saw no one there' in Mr Truly's FBI interview report, where 'there' is the building's front entrance--------where the LHO-Baker encounter the DPD had been telling the world about suddenly had NOT taken place!