Prince Arthur gaue a boxe of Diamond sure,
2 Embowd with gold and gorgeous ornament,
Wherein were closd few drops of liquor pure,
4 Of wondrous worth, and vertue excellent,
That any wound could heale incontinent:
6 Which to requite, the Redcrosse knight him gaue
A booke, wherein his Saueours testament
8 Was writ with golden letters rich and braue;
A worke of wondrous grace, and able soules to saue.

1 Prince Arthur gave a box of diamond sure,

sure > steadfast (if referring to the diamond); secure (if referring to the box)

2 Embowed with gold and gorgeous ornament,

Embowed > Encircled

3 Wherein were closed few drops of liquor pure,

few >

4 Of wondrous worth, and virtue excellent,

virtue > powers, efficacy

5 That any wound could heal incontinent: