PREV 2 of 2 NEXT THEN: It appears that pioneer photographer Henry Peterson has recorded Joseph Raber posing with his family in their garden at the south end of Lake Union in 1882. Enlarge this photo COURTESY OF RON EDGE THEN: It appears that pioneer photographer Henry Peterson has recorded Joseph Raber posing with his family in their garden at the south end of Lake Union in 1882. NOW: Historian Ron Edge returns to the Raber garden site, now a field of plastic at the northeast corner of Boren Avenue and Mercer Street. The changes are part of the Mercer Corridor Project, which can be studied on the Seattle Department of Transportation website at http://www.cityofseattle.net/transportation/ppmp_mercer.htm. Enlarge this photo JEAN SHERRARD NOW: Historian Ron Edge returns to the Raber garden site, now a field of plastic at the northeast corner of Boren Avenue and Mercer Street. The changes are part of the Mercer Corridor Project, which can be studied on the Seattle Department of Transportation website at http://www.cityofseattle.net/transportation/ppmp_mercer.htm.