Maybe:
Floor made with used boards. Previous holes were drilled out and plugged. Plugs are now falling out.
Clean the floor very well, till you can see the grain. Any remaining secure plugs may be visible then.
Bruce
Seeing the new photos with the holes in a repetitive pattern reinforces my belief in this.
Bruce
Before I believed it's just knot holes, I'd scrape a layer or two of dirt from a board to check the grain.
Wear on wood floor (see upper L corner of 2nd pic, post #338) suggests heavy traffic through doorway.
Maybe a steel-wheeled cart or dolly of old wore a 'limited' path, contained by whatever was perhaps lag-bolted to floor to right of doorway.
IMO a possible hole 'pattern' on floor hints that something was mounted where lack of traffic minimized 'erosion' on the area less worn.
Plugs in floor holes since equipment was removed continue to fall out due to seasonal extremes of moisture/humidity and temps.
My guess is as good as mine any day.![]()
Extremely good question! Now I need to find the specs to make sure the resolution and minimum focus length is suitable for this assignment. If I partake, I need to feel comfortable the tool is up for the job! This might require an empirical test before dispatching.Dragoneggs, very generous of you to offer Check your game camera. But is it high-definition? If not, how is it going to pick up tiny extraterrestrials as they move about?
Extremely good question! Now I need to find the specs to make sure the resolution and minimum focus length is suitable for this assignment. If I partake, I need to feel comfortable the tool is up for the job! This might require an empirical test before dispatching.