Remembering what resources you have on your bookshelf can be great when you start looking for an item.  I was looking for land boundary maps for Iowa in the 1860s.  The results of my Google search were not promising.  Lone and behold, on my bookshelves is Land and Property Research in the United States by E. Wade Hone.

The maps available in this book show the counties and the corresponding land offices based on years.  So much time could have been saved if I would just had taken the time to look at the resources in my possession.

Mr. Hone’s book provides the dates when particular land offices merged or moved.  This helps when a specific date is known.