That these two early stories by Rilke (``King Bohush'' and ``The Siblings'') are being released now may say more about the growing American interest in Prague than about any concern for the poet's apprentice fiction. But they will interest readers concerned with Rilke's literary development and with how his young mind grappled with some of the cultural problems of his day: Prague's relationship to Western Europe, particularly Germany, and the distemper of Europe at the turn of the century.