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Mumbower's Mill ledgers


Held at: Wissahickon Valley Watershed Association [Contact Us]12 Morris Rd., Ambler, PA, 19002

This is a finding aid. It is a description of archival material held at the Wissahickon Valley Watershed Association. Unless otherwise noted, the materials described below are physically available in their reading room, and not digitally available through the web.

Overview and metadata sections

Mumbower's Mill, also known as the Evans-Mumbower Mill and the Keefe-Mumbower Mill, is an historic grist mill in Gwynedd Valley, Montgomery County, Pennsylvania.

The earliest mill on the location of Mumbower's Mill was a saw mill and fulling mill constructed by Abraham Evans in 1745. It changed hands several times before it was demolished and replaced by a new mill, probably in the early 1800s, which still stands today. This mill was acquired by Henry Mumbower (1826-1892) in 1858, and the mill remained in the family until about 1930. Henry's son, David Mumbower (1856-1930) operated the mill for most of his life. David's brother, Henry Mumbower, Jr., was also involved. The firm was, at times, known as Henry Mumbower, Henry Mumbower & Sons, D. Mumbower, and D. Mumbower & Bro. Mumbower's Mill was a grist mill, grinding wheat, rye, corn, corn cobs, oats, and other grains.

Mumbower's Mill was one of scores of mills that flourished along the Wissahickon Creek in the late 18th and early 19th centuries. Originally powered by a water wheel, later on the mill was powered by a steam or gasoline engine.

After the Mumbower family's ownership of the mill ended, the building fell into disrepair until the Towamencin Historical Society acquired it in 1984 and initiated repairs. The mill was transferred to the care of the Wissahickon Valley Watershed Association in 1987. It was added to the National Register of Historic Places in 2011.


Wissahickon Valley Watershed Association. "Evans-Mumbower Mill." Accessed February 26, 2014.

This collection consists of ten ledgers from Mumbower's Mill under the operation of the Mumbower family. Most of the volumes are daybooks, also called "grist books," which list transactions chronologically. There are also a few account books, which organize transactions by customer name. Some of the volumes also include loose miscellaneous papers, mostly receipts/invoices and figuring calculations, as well as a few pieces of correspondence and catalog pages. The dates of the volumes are as follows: 1851-1875, 1860-1864, 1869-1874, 1880-1885, 1885-1891, 1891-1897, 1895-1904, 1897-1902, 1897-1920, and 1902-1909. Some volumes are indexed. More detailed inventories are available on-site.

Gift of Historical Society of Fort Washington, 2011.

Summary descriptive information on this collection was compiled in 2012-2014 as part of a project conducted by the Historical Society of Pennsylvania to make better known and more accessible the largely hidden collections of small, primarily volunteer run repositories in the Philadelphia area. The Hidden Collections Initiative for Pennsylvania Small Archival Repositories (HCI-PSAR) was funded by a grant from The Andrew W. Mellon Foundation.

This is a preliminary finding aid. No physical processing, rehousing, reorganizing, or folder listing was accomplished during the HCI-PSAR project.

In some cases, more detailed inventories or finding aids may be available on-site at the repository where this collection is held; please contact Wissahickon Valley Watershed Association directly for more information.

Wissahickon Valley Watershed Association
Finding Aid Author
Finding aid prepared by Celia Caust-Ellenbogen and Sarah Leu through the Historical Society of Pennsylvania's Hidden Collections Initiative for Pennsylvania Small Archival Repositories
This preliminary finding aid was created as part of the Historical Society of Pennsylvania's Hidden Collections Initiative for Pennsylvania Small Archival Repositories. The HCI-PSAR project was made possible by a grant from The Andrew W. Mellon Foundation.
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