501 With bolder wing shall dare aloft to sty
sty > rise, soar
502 To the last praises of this Faery Queen;
last > (Speaking of that time when all 24 books of the poem will be complete)
503 Then shall it make more famous memory
memory > memorial; historical record
504 Of your heroic parts, such as they been:
parts > abilities, qualities been > [are; were]
505 Till then, vouchsafe your noble countenance
countenance > regard