Final answer:
The 'knight-at-arms' in the poem is a knight who believes in social justice and wears a red-cross on his shield.
Step-by-step explanation:
The two statements that can be said to be true concerning the 'knight-at-arms' featured in the poem are:
- He is a knight who believes in social justice.
- He is a red-cross knight.
According to the lines from the poem, the knight is described as a believer in social justice and wears a red-cross on his shield, indicating his association with chivalry and courage.