Swiss Post
... that in 1850, about a quarter of the post offices of the Swiss Post were located in taverns?
... that in 1850, about a quarter of the post offices of the <b id="mwATg"><a href="./Swiss_Post" id="mwATk" rel="mw:WikiLink" title="Swiss Post">Swiss Post</a></b> were located in <a href="./Tavern" id="mwATo" rel="mw:WikiLink" title="Tavern">taverns</a>?