Arnold debuted on the Boston stage at the age of nine, only three months after her arrival in the United States. She played a character named Biddy Blair in David Garrick's farce "Miss in Her Teens" and was praised in the "Portland Herald": "Miss Arnold, in Miss Biddy, exceeded all praise.. Although a miss of only nine years old, her powers as an Actress will do credit to any of her sex of maturer age". Later that year, Elizabeth married musician Charles Tubbs, who had sailed with the Arnolds from England. The small family joined with a manager Mr. Edgar to form a theater troupe called the Charleston Comedians. Elizabeth, Eliza's mother, died sometime while this troupe was traveling through North Carolina. Little is known about her death but she disappears from theatrical records in 1798 and it is presumed she died shortly after.