Many Tanneries were in Frederick in 1887 - Birely Tannery only one left..
The 1887 Sanborn Map's Index lists 4 Tanneries in Downtown Frederick.
Bantz Tannery - GONE - stood on Brewers Alley, Carroll Creek was moved and now flows where the Tannery Building once stood.
Geo. K. Birely Tannery - one building remains.
Brown and McKinney Tannery - GONE - stood on corner of Carroll Creek and S. Market.
NIxdorff and Brokeys Tannery - GONE - stood about where the Frederick County Library is.
Further, Frederick Magazine identified the Birely Tannery on its Most Endangered List in 2012.