Just thinking out loud again …
What struck me about Williams’ efforts to show he couldn’t have seen Oswald in the sniper’s nest is that he should have been able to see Rowland’s guy by the southwest window if there was any overlap in time. Because I’m stuck inside the house, I spent some time trying to put together a realistic scenario and had a heck of a time. The actual timing of what occurred is critical.
It's hard to determine exactly when the flooring crew actually went down. It appears some of them understandably may have been reluctant to admit they knocked off work earlier than usual. My best estimate would be 11:40-11:45, which is what some said.
No one really saw Oswald on the sixth floor before the crew knocked off. Williams said he might have seen him messing with boxes during the morning, but not near the sniper’s nest. This would have been consistent with Oswald’s order-filling work, and Williams was very unsure. The unreliable Dougherty said he encountered him at the boxes about 11 AM, routinely filling orders.
When the flooring crew went down, the consensus was that Oswald was near the east elevator on the fifth floor. He called out something about leaving the gate open when they got to the first floor.
Shelley was absolutely consistent in having seen Oswald working and standing near the telephone on the first floor around 11:50 (rather odd if Shelley was part of some conspiracy to frame him!). Piper spoke to him on the first floor at about noon, when Oswald said he was going up to lunch.
Everything suggests to me that Oswald was keeping up the appearance of business as usual until at least noon. This obviously would have been smart – make sure you’re seen working and not on the sixth floor. He could have assembled and stashed the rifle before the flooring crew started work, or just a short time before the assassination – it was not a big project.
Givens didn’t mention his sixth-floor encounter with Oswald until the WC. As a Black guy with a criminal record who'd left the TSBD, the last thing Givens needed was to have been alone with Oswald on the sixth floor. I see nothing suspicious about omitting the encounter until the WC.
Givens strongly suggests the crew left fairly early. He went downstairs, went to the bathroom, encountered Oswald when he went back up, and was still out of the TSBD at noon. One possibility is that he encountered Oswald before Oswald was seen by Shelley and Piper on the first floor. He reported Oswald walking toward the elevator from the area of the sniper’s nest with his clipboard in his hand. Oswald declined a ride down but said he’d be down shortly. This would be my guess – Oswald had gone from the fifth floor to the sixth via the stairs and encountered Givens before he (Oswald) went down.
Then we have Williams, another Black guy who understandably would have wanted to distance himself from seeing Oswald or anything suspicious on the sixth floor while he was eating his lunch. He said he could not see any part of the sniper’s nest area other than the top of the window as he ate his lunch – but he seemingly should have seen Rowland’s guy if the latter were over by the southwest window.
If Williams’ estimate of the time is pretty close, he could have arrived at the sixth floor just shortly after Oswald – say 3-5 minutes after noon - and could have left a few minutes before Rowland saw Oswald at the southwest window. Oswald would have been quiet in the sniper’s nest during this time and emerged after hearing Williams leaving.
I’m still a bit troubled by Rowland’s story. It seems very risky for Oswald to be standing at the southwest window with his rifle in that manner, and I’m not sure what he would be doing other than testing it as an alternative to the sniper’s nest. By that time – 12:15 or perhaps 12:20, he would have been pretty confident of being alone on the sixth floor and presumably could have heard anyone coming up.
I’m not, of course, factoring in any of the conspiracy-oriented discrepancies (such as having Piper on the sixth floor actually witnessing the shooting!). I’m trying to picture what actually occurred, with people perhaps being off on their time estimates by a critical few minutes here and there but not blatantly lying. Shelley seems to me a very good “time anchor” for Oswald being on the first floor just shortly before noon, which is not at all implausible.