Впрочем, да не покажется, что я устрашаю вас только посланиями.
That I may not seem as if I would terrify you by letters.
for I do not wish to seem as if I would terrify you by my letters.
I do not want to appear to be frightening you with my letters.
I do not want to seem to be trying to frighten you with my letters.
lest I seem to terrify you by letters.
I’m not trying to frighten you by my letters.
that I may not seem as if I was frightening you by letters: