Hello Craig and thank you for your kind and patient response. My comments under your paragraphs:

: Hello Phil,

: At one of the two séances I attended, I was able to be one of the checkers. Two people from among the sitters not connected with David Thompson are permitted to examine every step in the process of preparing David for the séance. We then checked everything after the seance, before David was released from his ties. He was secured, with no chance of release.

: All sitters (around 30) were in the room observing our checking and listening to our comments about what we were observing. They also could see the process clearly. David was secured to the chair with plastic cable ties, also called zip strips, that cannot be released once they are pulled through the ratchet. His cardigan sweater was similarly secured shut with zip strips inserted through the material so it could not be removed. He was gagged with material through his mouth around the back of his head. The knot at the back of his head was secured with a zip strip. It would be impossible for him to release himself, then somehow single-handedly insert new zip strips around both arms and both legs. So we knew he couldn't move.

=> So I suppose the chair too was not tricked for example with removable armrests

: We sat cheek to cheek with each other around the perimeter of the room. The circle coordinator, Christine, sat next to me as one of the checkers. The person running the music player sat next to the other checker. We held both of their hands during any activity in the room.

: During the séance, when there was any materialization or movement, we all held hands, so we knew where everyone in the room was. I and the other checker held both hands of the circle coordinator and the person playing the music, so we had no doubt about their presence beside us. They were also speaking during the séance, so we heard their voices next to us. There was no one in the room except the sitters, these workers, and David Thompson, and at every moment, we were in touching contact with everyone else. No one could have gotten up and moved around the room.

=> Only a sitter or two not identified as “workers” that is. But yes, you’re right. In the dark it is hard to do things, and silently too.

: The trumpet whizzed around the room along the length and breadth of the approximately 30 feet by 20 feet room, with 8-foot ceilings, banged on the ceiling, and banged on the floor for an extended period of time. We could see the strips of luminescent tape that were attached to it. At the same time, a small table that was in the middle of the room was lifted and sailed around the room while the trumpet was whizzing around. It also had luminescent tape on it. The table banged against the ceiling and floor.
=> It is good that these flying objects hurt no one.

: At the end of the first séance, David, in his chair, had been transported to about 10 feet outside of the cabinet in which he began. His cardigan was backwards, with the buttons in the back.

=> Impressive. How long was the séance?

At the end of the second séance, David was transported across the length of the room to just in front of the line of people sitting against the wall at the end of the room opposite the cabinet. Beside him was a heavy, glass-topped sofa table that had been behind the cabinet at the other end of the room and was transported during the seance. On the other side of him was the small table with the trumpet disassembled into two pieces and a pile of bells beside it that had been laying on the sofa table. I was not a checker during the second seance, so this arrangement was directly in front of me as I sat at that far end of the room from the cabinet. I heard no sound from the bells being assembled there.

=> What can I say? Impressive again.

: No individual could have navigated the room in the dark to make the trumpet and table speed around the room from ceiling to floor, move the table around independent of the trumpet, bang the two on the ceiling, bang the two on the floor, and rearrange the furniture. A plywood plank was in the middle of the floor, so we would have heard someone stepping on it. No single individual could have lifted David Thompson and moved him, secured to the chair, to the middle of the room, or could have neatly arranged the two tables, a pile of bells, and the trumpet at the end of the room with David, in his chair, between them. In fact, I doubt that two people could have accomplished that even in full light.

: Every person in the room was accounted for during the entire séance, and what we witnessed would have been impossible for any person to have done in the dark.

: That's how we know it was those in spirit who performed all of what we witnessed.

: Love and peace, Craig

=> Love and peace to you too, Phil.