thereto > to them; moreover; suitable to them [the wounds]

7 And evermore with mighty spells them charmed,

them > [the balms and herbs; or Pyrochles's wounds]

8 That in short space he has them qualified,

That > [So that] them > [Pyrochles's wounds] qualified > moderated, mitigated

9 And him restored to health, that would have algates died.

algates > altogether, at any rate; hence: surely

CANTO VII

Guyon findes +Mamon+ in a delue,
2 Sunning his threasure hore:
Is by him tempted, and led downe,
4 To see his secret store.

1 Mamon > Mammon 1609