Wilmer W. Marshall (1847-1905) was a Philadelphia Quaker businessman. He was the son of Caleb and Jane Marshall and a member of Philadelphia Monthly Meeting (Hicksite). In 1876, he married out of meeting to Julia Jacoby. The collection includes diaries and a small amount of correspondence and miscellaneous material. The diaries cover the years 1859-1878 and relate daily life, including his attendance at meeting, family concerns, and participation in political meetings during the Civil War.