G.H. Thomson
Room 21,
Grand Central Depot
Jan'y. 7th, 1889
Theo Cooper Esq.
Dear Sir: 
Enclosed you wil lfind a lis tof bridges constructed by Howard Carroll on the old N.Y.Conn R.R. and amounting to 3106 1/2 single track linear feet.  Any information you may want about weights, cost, design, wear, etc. I will gladly give you, and you can take the photographs if you wish, and I can give you Carrolls  methods of design when next at the society.  Have not found yet the date of the Rider brider bridge.
Your Very truly
G.H. Thomson

New York Central and Hudson River Railroad Company
Glenn Station 1/7, 1889
[List of Bridges constructed by Howard Carroll]