Well, there is a third option:
The small scale of the drawings simply meant that it was far easier to draw merlons in a "v" shape than the three stroke |-| shape.
If the artist attached no importance to the merlons - and why should he? - then would he even have consciously made the decision, in such a small space?
To put it another way: was the artist depicting a stylistic interpretation of "a" castle, versus the realistic depiction of "that" castle?
Given that all the merlons are depicted in the same way, irrespective of the structure they sit upon, I suggest it's the latter - the artist simply drew them like that because of the lack of space, and possibly of understanding.
The small scale of the drawings simply meant that it was far easier to draw merlons in a "v" shape than the three stroke |-| shape.
If the artist attached no importance to the merlons - and why should he? - then would he even have consciously made the decision, in such a small space?
To put it another way: was the artist depicting a stylistic interpretation of "a" castle, versus the realistic depiction of "that" castle?
Given that all the merlons are depicted in the same way, irrespective of the structure they sit upon, I suggest it's the latter - the artist simply drew them like that because of the lack of space, and possibly of understanding.