The Letters of Queen Victoria: A Selection from Her Majesty's Correspondence Between the Years 1837 and 1861, all three volumes in a single file

According to Wikipedia: "Victoria (Alexandrina Victoria; 24 May 1819 22 January 1901) was the Queen regnant of the United Kingdom of Great Britain and Ireland from 20 June 1837, and the first Empress of India of the British Raj from 1 May 1876, until her death. Her reign as the Queen lasted 63 years and 7 months, longer than that of any other British monarch before or since, and her reign is the longest of any female monarch in history. The time of her reign is known as the Victorian era, a period of industrial, cultural, political, scientific, and military progress within the United Kingdom. Victoria ascended the throne at a time when the United Kingdom was already an established constitutional monarchy, in which the king or queen held few political powers and exercised influence by the prime minister's advice; but she still served as a very important symbolic figure of her time. Victoria's reign was marked by a great expansion of the British Empire. During this period, it reached its zenith and became the foremost global power of the time."