301. Ayer Mill clock tower at sunset Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1990–1999] Institution: Lawrence History Center
302. Ayer Mill clock tower at sunset Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1990–1999] Institution: Lawrence History Center
303. Ayer Mill clock tower at sunset Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1990–1999] Institution: Lawrence History Center
304. Ayer Mill clock tower at sunset Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1990–1999] Institution: Lawrence History Center
305. Ayer Mill clock tower in the background Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1990–1999] Institution: Lawrence History Center
306. Ayer Mill complex Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1860–2011] Institution: Lawrence History Center
307. Ayer Mill construction, c 1909 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1909] Institution: Lawrence History Center
308. Ayer Mill construction ca 1909 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1909] Institution: Lawrence History Center
309. Ayer Mill construction ca 1909 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1909] Institution: Lawrence History Center
310. Ayer Mill construction ca 1909 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1909] Institution: Lawrence History Center
311. Ayer Mill construction ca 1909 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1909] Institution: Lawrence History Center
312. Ayer Mill employees c. 1920 Format: Photographs Collection: Lawrence History Center Photograph Collection Date: [ca. 1920] Institution: Lawrence History Center
313. Ayer Mill. Wood mill behind it Format: Photographs Collection: Lawrence History Center Photograph Collection Date: April 1983 Institution: Lawrence History Center
314. B. B. & R. Knights cotton mill, Readville Format: Photographs Collection: Boston Pictorial Archive (Collection of Distinction) Date: 1938 Institution: Boston Public Library
315. Back gate Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: October 9, 1854 Institution: University of Massachusetts Lowell, Center for Lowell History
316. Back gate Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: October 9, 1854 Institution: University of Massachusetts Lowell, Center for Lowell History
317. Back gray washers, central building Format: Photographs Collection: Lawrence History Center Photograph Collection Date: February 1914 Institution: Lawrence History Center
318. Back gray washing. Central building Format: Photographs Collection: Lawrence History Center Photograph Collection Date: February 1914 Institution: Lawrence History Center
319. Back of Holbrook's mill Format: Photographs Collection: Beaman Memorial Public Library Historical Collection Date: [ca. 1895–1900] Institution: Beaman Memorial Library
320. Baird Mill Format: Photographs Collection: Lee Library Historical Photograph Collection Date: [ca. 1850–1860] Institution: Lee Library Association
