The main focus of the arts during the Civil War was photography. Matthew Brady and Alexander Gardner were two prominent photographers who took pictures of battlefields, camps, soldiers, and generals. Their photographs were widely published in newspapers. Union and Confederate soldiers enjoyed singing patriotic and sentimental songs. Popular Union songs included "The Battle Cry of Freedom" and "Just Before the Battle, Mother" while Confederate favorites were "Bonnie Blue Flag" and "Maryland, My Maryland". Literature such as Harriet Beecher Stowe's novel "Uncle Tom's Cabin" influenced public opinion on slavery. Harper's Weekly was a widely read newspaper that kept people informed on battles and casualties through articles and photographs.