It's 'in those days'.. specifying those days as in the past.
The main reason why Franz Kafka, before his death, instructed his friend Max Brod to destroy all his unpublished manuscripts was because he didn't want his unfinished work to be read.
Gravity, but if you think about it, air resistance can slow the object down, thus meaning that there are 2 forces acting on the object, but just go with gravity
