Translation of sellar

Some of the disadvantages are the coldness, darkness and the fact that the days are a lot shorter then as in the summer. First let me tell you what I do not like about the winter. It is the following.
Please write me from your home as soon as your are back. My Spanish is better than that of most Americans, but my English is worse than that of most people here. It is a strange position that I am in.
We spent the entire day doing nothing, just waiting for the night train which would take us into the northern mountain area of Vietnam, close to the Chinese border. The train left at around ten.