2. through images of sleeplessness
In the first passage, the captain of the Mary Rogers is described as sleeping most of the time in his clothes, though rarely actually sleeping. This shows how consumed he is by the struggle to round Cape Horn, indicating an excessive amount of passion and dedication that is potentially dangerous.
In the second passage, the miner who has discovered a rich vein of gold named Mr. Pocket is also likely consumed by his find, possibly leading him to work tirelessly and lose sleep in his pursuit of wealth. This further emphasizes the theme of having too much passion for something being dangerous.