Answer:
Damon sent Artemis for ingredients that he didn't really need because he didn't want Artemis to behold the gory sight. He knows Artemis can't stand the sight of blood.
Step-by-step explanation:
"Wadjet Eye" is a historical novel by Jill Rubalcaba which revealed the death of the mother of Damon and the embalming that was required for her to be buried. The embalmer left the son to embalm the body of his mother because the embalmer believed she died of plague. Damon wanted to keep Artemis away during the embalming process. So, that's the reason he sent Artemis to get ingredients he didn't need.
The novel tells the story of Damon and his journey to Spain when he went to deliver the news of his mother's demise to his father who he didn't really know. They had several unpleasant experiences along the journey - shipwreck, attack from sharks and other interferences from Cleopatra, Cicero and Caesar.