| Quote #1 And mine has been the fate of those |
The speaker makes his situation a universal one – he has shared the same "fate" as many others who have been imprisoned.
| Quote #2 There are seven columns, massy and grey, |
In the dungeon, even the stray "ray" of light that has made its way in through a crack in the wall seems "dull" and "imprison'd."
| Quote #3 That iron is a cankering thing, |
The chains that bind the prisoner seem to leave lasting, festering marks on him that never heal. Is he talking about literal wounds, or psychological wounds?