ARNOLD ARBORETUM,HARVARD UNIVERSITY.Jamaica plain, Mass,.........March 13,...............1899.My dear Muir:The mail has just brought me yours of the 8th and I hasten to congratulate you on the termination of the grippy condition of your family. It has been a horrid winter, I believe, for every one and I rejoice that it is nearly over. Massachusetts, however, is not California in March, and we are still enjoying east winds, slush, melting snow, mud and all the other horrors of our spring.Your Oak was duly received and seemed to us at the time to be Quercus Garryana, but who can tell much about an Oak-tree from such specimens, certainly I cannot.I am very pleased and contented at what you write about The Silva. Few people, I fancy, can realiz...