At the age of 14, sumac poisoning damaged his eyesight, so he apprenticed as a topographic engineer.  
At the age of 14, sumac poisoning damaged his eyesight, so he apprenticed as a topographic engineer.  His 1852 book, Walks and Talks of an American Farmer in England, tells of his studies of English landscaping. He chaired the Yosemite commission and collaborated with Calvert Vaux on the Niagara Falls project, and laid out the Mount Royal Park in Montreal, Piedmont Park in Atlanta, and 1893 World's Columbian Exposition in Chicago. FTP, name this designer of Central Park in Manhattan.
At the age of 14, sumac poisoning damaged his eyesight, so he apprenticed as a topographic engineer.  
Frederick Law Olmsted