So!
If the scenario I have outlined in this thread is correct, then it follows that Prayer Man
in Darnell is not Mr Oswald. He had already left the steps and was way west by the time Darnell filmed those frames.
So who might Prayer Man in Darnell be?
I believe it may in fact be Ms Carolyn Arnold, whom Mr Shelley in his March 64 FBI statement names as one of the people on the steps at the time of the shooting:
She may have been the young woman whom Mr Ronald Fischer noticed going into the building just before the motorcade arrived in Dealey Plaza.
She was six months pregnant, and may have wished to get out of the sun.
Because everyone on the steps was intently awaiting the motorcade, Ms Arnold's arrival there went all but unnoticed (only Mr Shelley, who ended up standing beside her, noticed).
She had noticed Mr Oswald up in the lunchroom several minutes before this. And as she now went up the steps to get into the shade, she noticed him again: standing behind the glass door. The FBI will see to it that this sighting is reflected in her FBI interview report, but they will grossly distort the true time and circumstances. This gives them insurance lest she go public with her story: 'She told us something different, now she's changing her story for sensational effect.'