"Toilet" - not our usual usage

I would venture a guess that most people today use the word "toilet" exclusively to mean "restroom" or "commode." However, in 1980, when I read Douglas Southall Freeman's monumental biography of R. E. Lee, he said that in the morning the General "made his toilet." This sent me searching. A restroom and its fixtures is only the fourth definition in the dictionary I have. The first three are 1) a dressing table; 2) the act or dressing or grooming oneself; and 3) dress or attire.