Mark Twain
Mark Twain, also known as Samuel Langhorne Clemens, is a well known American writer, as well as an entrepreneur and publisher. Some even called him the "father of American Literature".
He was born on November 30th, 1835 and died on April 21st, 1910. He was born in Hannibal, Missouri, which inspired the settings for some of his most famous works: Tom Sawyer and Huckleberry Finn.
In the beginning of his career he was an apprentice, contributing articles towards the local Hannibal newspaper company that his brother, Orion, owned. After a failure at trying to work in the mining industry, he went back to journalism writing for the Virginia City Territorial Enterprise; where his fame started.
Twain also had an interest in technology, and even created three inventions, one of those being a self-pasting scrapbook. He was also an early advocate for fingerprinting as a forensic technique, and featured it in some of his writings.
He was also very influential in the fountain pen industry, to no surprise as a writer and entrepreneur. He heavily promoted the idea of the Conklin Crescent Filler, getting away from using the eyedropper method. Twain and Conklin formed a relationship during the early 1900's, and Mark Twain eagerly became a spokesperson for the company. 
This new invention in the fountain pen world was a milestone, as it was an easier and less messy way of refilling your fountain pen. In a letter of endorsement later used in an ad, Twain wrote: “I prefer it to ten other fountain pens, because it carries its filler in its own stomach, and I cannot mislay even by art or intention. Also, I prefer it because it is a profanity saver; it cannot roll off the desk.”
Conklin now sells a line of fountain pens that are contributed to Mark Twain, with updated technology of course using a cartridge/converter (I wonder what he would have thought of that?!) However, if you are interested in the use of the crescent filler, they also sell a limited edition Mark Twain crescent filler.
Take a look at Conklin's Mark Twain fountain pens: https://tinyurl.com/yyt3689g
Have a great Friday & a wonderful weekend!
