Charles Beale wrote her a passionate love letter and poem on 25 July of an unknown year. Mary Cradock married Charles Beale on 8 March 1652 at the age of eighteen. Her father, John Cradock, was gravely ill at the time and died a few days after Mary's marriage. The couple moved to Walton-on-Thames at some point afterward. Charles Beale was a Civil Service Clerk at the time, but eventually became Mary's studio manager once she became a professional painter. At some point, Charles was working for the Board of Green Cloth where he mixed colour pigments. Circa 1660-64 the family moved to Albrook, (now Allbrook), Otterbourne, Hampshire, to escape the plague. Throughout their marriage, Mary and Charles worked together as equals and as business partners, which was not often seen at the time. On 18 October 1654 Charles and Mary's first son, Bartholomew, was buried. Little else is known about their first son. Their second son was baptised on 14 February 1655/6 and also named Bartholomew. Their third son Charles was born in 1660. The most common way to learn how to paint at the time was to copy great works and masterpieces that were accessible. Mary Beale preferred to paint in oil and water colours. Whenever she did a drawing, she would draw in crayon. Peter Lely, who succeeded Anthony van Dyck as the court painter, took a great interest in Mary's progress as an artist, especially since she would practice painting by imitating some of his work. Mary Beale started working by painting favours for people she knew in exchange for small gifts or favors. Charles Beale kept close record of everything Mary did as an artist. He would take notes on how she painted, what business transactions took place, who came to visit, and what praise she would receive. Charles wrote thirty notebooks' worth of observations over the years, calling Mary "my dearest heart". She became a semi-professional portrait painter in the 1650s and 1660s, working from her home, first in Covent Garden and later in Fleet Street in London. When living in Convent Garden, Beale was a near neighbor to artist Joan Carlile. Mary received no formal training from an academy, had no connection to an artist guild, and no royal or courtly patronage. She received a humanist education from her father, who is most likely the one who taught Mary how to draw and paint.