We should surely read 'the other.'
"That by misfortune was my life prolong'd."
It might be better to read Thus for 'That.'
"That his attendant—for his case was like."
For 'for,' the judicious correction of 2nd folio, the 1st has so.—See on L. L. L. i. 1; 1 Hen. IV. i. 3.
"To seek thy help by beneficial help."
See Introd. p. [61]. For the first 'help,' Pope read life; I read ransom, a word already used by the Duke. If the error should be in the second 'help,' we might, with Malone, read means; which, however, is rather feeble.