What is "doing justice"

Usage examples of "doing justice".

Marsac at Grenade and doing justice to the memory of poor Lesperon.

Upon this point, I cannot forbear doing justice to the queen my mistress, and Glumdalclitch my nurse, whose persons were as sweet as those of any lady in England.

But doing justice, as I always will, to those who have been unjustly calumniated, at the same time I must admit that there is a point connected with slavery in America which renders it more odious than in other countries.