On The Errors And Mischiefs Of Modern Diplomacy: As Based Upon The Assumed Prerogative Of The Crown In Matters Of Peace And War is a book written by Henry Ottley and published in 1872. The book is a critical analysis of modern diplomacy and its flaws, specifically focusing on the assumed prerogative of the Crown in matters of peace and war. Ottley argues that this assumption has led to numerous errors and mischiefs in modern diplomacy, which have...