Soon > [As soon] in place > there

2 They all at once out of their seats arose,

at once > together, simultaneously

3 And to her homage made, with humble grace: 4 Whom when the knights beheld, they gan dispose

gan > did

5 Themselves to court, and each a damsel chose: 6 The prince by chance did on a lady light,

light > alight, chance

7 That was right fair and fresh as morning rose,

right > very

8 But somewhat sad, and solemn eke in sight,