How we cite our quotes: (Chapter.Paragraph)
Quote #7
The impression they give to the stranger pulling close up in his boat under their grim cliffs is, that surely he must be their first discoverer, such, for the most part, is the unimpaired…silence and solitude. (5.55)
Sailors feel like they must be the first discoverers, even if they aren't. Isolation is lonely and scary, but it's also kind of exciting; it can be easier to feel like you're important if you're alone.
Quote #8
At a secure retreat, an undiscoverable hiding-place, no spot in these days could have been better fitted. …surrounded by islands, whose inhospitable aspect might well drive away the chance navigator…the unmolested Buccaneers found here that tranquility which they fiercely denied to every civilized harbor in that part of the world. (5.85)
Again, isolation isn't such a bad thing when you're an antisocial criminal and pirate. If society is after you, it's better to be alone.
Quote #9
Those two unnamed events which befell Hunilla on this isle, let them abide between her and her God. In nature, as in law, it may be libelous to speak some truths. (5.147)
The suggestion here seems to be that Hunila first lost a baby, and then ships landed on the island at some point, and sailors abused or raped Hunilla. (See Characters: Hunilla) The isolation of the island, then, becomes the isolation of her trauma, or abuse. And while the sailors and the narrative rescues her from the first, they don't from the second. She remains isolated even when rescued in part because what happened to her is presented as unspeakable, and effectively as isolating her forever.