When Ross leaves the pub after speaking with Francis he has his map and saddle bags with him. Then when he is striding to meet the investors he only has his riding crop with him. When he opens the door to the building where the investors were meeting he has his map and saddle bags again.
When the dueling pistols are seen hanging on the wall, the jaws were in the fired position. If the pistols had been loaded with the pan primed they should have been in the half-cocked position.
When Francis and the Captain first step outside, the captain's pistol is cocked but two seconds latter, it isn't. Similarly, Francis' pistol isn't cocked, then it is, then it isn't and then when Francis gets face to face with the captain, they both cock their pistols.
When Francis and the Captain first step outside, the captain's pistol is cocked but two seconds latter, it isn't. Similarly, Francis' pistol isn't cocked, then it is, then it isn't and then when Francis gets face to face with the captain, they both cock their pistols.
When Ross receives his bread and fish at the mine, his bread was fluffy, jagged, and uneven. The bread was crust side down until he goes to sit down to eat, then his bread was brown crust side up smooth, and rounded.
Poldark is looking closely at a chunk of ore dug up from the mine years earlier from just before it closed. The copper is bright and shiny but copper ore turns green, particularly when it is kept near the ocean.
When Poldark descends into the mine via the ladder, the top of the ladder is secured with a nickel plated hex-head lag screw and washer. Clearly not a fastener available in the late-1700s.