It's hard to do justice to the Goad Fire Insurance Maps now online from LAC. The extract is part of one of 103 segments of Goad's January 1888 map, revised to January 1901, showing the intersection of Wellington and Bay and the breweries that occupied the site on which the Library and Archives Canada building at 395 Wellington now stands. Access this whole Ottawa set from http://bit.ly/bFoLBx
Access the whole collection by searching "fire insurance plan", with the name of the community of interest if desired, at http://www.collectionscanada.gc.ca/lac-bac/search/arch.
(via University of Toronto Map and Data Library blog at http://maplib.blogspot.com/2010/07/canadian-fire-insurance-plans-and.html). Also a tip of the hat to Hugh Reekie who first introduced me to Goad's maps - http://www3.bell.net/max-com/Goad.html