1 They been met, and both their points arrived,

been met > were met, did meet

2 But Guyon drove so furious and fell

fell > fiercely, terribly

3 That seemed both shield and plate it would have rived;

seemed > [it seemed] plate it > [armour Guyon's spear] rived > split, punctured

4 Natheless it bore his foe not from his sell,

Natheless > Nevertheless sell > saddle

5 But made him stagger, as he were not well:

as > [as though]