Hi all!
Sorry to interfere again. Actually this text was without punctuation, nothing at all from the beginning and so the versions of translation could have been more, depending where you put the comma.
The versions of translation can be these ones:
1. Yesterday night his boss worked. M. told me that... - I didn't pick this one because of the thing that bosses usually don't work at night, my opinion. ^.^.
2. Yesterday night he worked. His boss, M., told me...- this one could have been too, but we needed extra commas before and after the name.
And this is how I remained to the version of translation that you can see now: "Yesteday night he worked. M.'s boss told me[...]"
Just to make this text clearer for everyone.