http://pec.lib.wvu.edu/record/P18084undatedThe House of Gurley : twenty centuries, 2000 years, represents the total service of those now employed by the House of Gurley, half of which, 1000 years, is made up by twenty-eight men.Brochure. Postcard inserted.W. and L. E. Gurley (Firm)Surveying--Instruments.W. and L. E. Gurley (Firm)Hydraulics--Instruments.14256