From our companion thrown into his grave,
So his familiars to his buried fortunes ...
Slink all away, leave their false vows with him," etc.
If we read Upon or On for 'From,' and point as I have done, all seems simple enough. M. Mason ingeniously transposed 'From' and 'to.' After all, however, 'From' may have been the poet's word.
"And we, poor mates, stand on the dying deck."
A 'dying deck' is an odd expression; sinking would apparently make better sense. Yet dying bed, i.e. death-bed, may still be heard.
"Who would be so mock'd with glory? or to live
But in a dream of friendship, and survive