About Platt Rogers Spencer
Platt Rogers Spencer was the originator of Spencerian penmanship, a popular system of cursive handwriting. He was a teacher and active in the business school movement. Spencer taught in New York, where he founded the Spencer Seminary in Jericho, housed in a log cabin. Bryant & Stratton Colleges were founded in over 50 cities in the United States by students of Spencer, and Spencer was involved with the institution. Platt became passionately fond of writing.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.