Answer:
One must mourn before moving on.
Step-by-step explanation:
"No ship made sail next day until some shipmate had raised a cry, three times, for each poor ghost unfleshed by the Cicones on that field."
This sentence describes the grief, mourning, and respect the soldiers had for their lost comrades and amplifies the fact that the mourning must take place before moving on. "No ship made sail next day until some shipmate had raised a cry..."
Cheers.