Mid-17th century copies of two authentic private letters from the real, historical Książę Bogusław Radziwiłł (1620-1669) to the real, historical Chorąży Orszański Samuel Kmicic (d. 1692) from 30.04.1660 and 27.08.1660. Książę Bogusław calls in both of them Kmicic "Your Grace and my Friend" ("Mój Miłościwy Panie i Przyjacielu").

We all know, that H. Sienkiewicz's "Trilogy" characters are not fictional. But who could tell, that Friendships between them are not fictional too;-)))))

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