In a letter directed to "My Unknown Friend," but having no date, he deals with the disownment question.
Now, as I was sitting one afternoon by my barrel, wishing it were full, it happened that I looked down into the street, and saw there my unknown friend, waiting patiently in his empty cart.
This unknown friend was a tall, high-shouldered man, who drove in, occasionally, with vegetables.
And though I had never spoken a word to him, nor he to me, I called him my unknown friend, for a sight of him always did me good.
I do not address the world in general, who would profit little by the course of education here recommended: I only write to my Unknown Friend.
Before I was confined here, I learned his arrival in France, and sent a confidential person to offer him the services of an unknown friend.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "unknown friend" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.