Death of Marilyn Monroe. On August 5, 1962, Marilyn Monroe died of a barbiturate overdose in Los Angeles. She was a major sex symbol and one of the most popular Hollywood stars during the 1950s. She was a top-billed actress for a decade, and her films grossed $200 million by 1962. At the time of her death, Monroe had suffered from mental illness and substance abuse for several years, and had not completed a film since The Misfits, released in 1961.
There is no set standard for how fast a specific individual horse can run, and there are even variations between individuals of the same breed and bloodlines. The Ultimate Horse Site reports that the average horse can gallop at approximately 30 miles per an hour, give or take a couple of miles for the individual horse. Older horses, or those that are not well conditioned or have health problems, will probably gallop significantly slower than 30 miles per hour.
Wikipedia supports this, with a claim of 30 miles (50km) per day for a small mounted company. This involves the horse walking for most of the duration of the day, with short breaks. Of course, a fit horse can travel further than this. Mounted soldiers would ride their horses 50-60 miles (80-100 km) in a day. This is more taxing on both the horses and the riders. Over the course of 6 weeks of travel, it's possible that good riding horses would get into better travel shape, and be able to go further, perhaps in the 40 mile (65 km) per day range. This would involve spending much of the day at a pace faster than a walk, such as a trot, though not at a canter or gallop.