Margaret Emma Barber or M. E. Barber, was a British missionary in China. She was born in 1866 in Peasenhall, Suffolk, England, the daughter of Louis and Martha Barber. The family moved to 59 St Martins Lane Norwich around 1876 and established a Carriage Manufacturing business. The family home in Norwich was opposite St Martins Parish church which was intensely evangelical in the 1880 - 90s and must have had an influence on the Barber family. During the course of her life, she lived in China twice to preach the Christian gospel. She left her home and travelled in a lonely way thousands of miles. Barber, who initially went to China as an Anglican, became an independent missionary with informal ties to the Plymouth Brethren. She is best known for her influence on Watchman Nee.