On far too many pages, a precise overnight temperature was mentioned.


Page                Temperature (°F)
37                  -24, -25
315                 -5
46                  -22
341                 -20
345                 -45


Mortar fire goes in a arcing parabola: up, then down.
Raking/sweeping implies a substantially horizontal trajectory.

p 102               "street was swept by mortar fire"
p 102               "street was raked by a new salvo of mortar fire"