Statistics for occurrence #1 of “Fort Monroe” in chapter 5, page 159 of Colonel Theodore Lyman, With Grant and Meade from the Wilderness to Appomattox:
...they would allow two or three months for the making of plans and collecting of materials.
Then not less than a year to build it. This was a busy night on the river, messages going to City Point and Fort Monroe , and ferryboats and gunboats coming up as fast as possible to the neighborhood of Charles City. . . .
...