Premise:
"(For nearly a century, until 1878, St. Barts was the only possession Sweden ever had in the Caribbean; . )"
Hypothesis: (Sweden first acquired St. Bart's in 1778;.)

it is not possible to tell

Premise:
"He fears that if he remains in the room he may have to open it again, and that Mrs. 168 Inglethorp might catch sight of the letter before he could snatch it up. "
Hypothesis: His biggest fear is staying in the room and having to open it again.

it is not possible to tell

Premise:
"The information presented should be sufficient to convince the report users to recognize the validity of the findings, the reasonableness of the conclusions, and the benefit of implementing the recommendations."
Hypothesis: The information presented should be sufficient to convince the report users to recognize the validity of the findings.
yes