Royalty and mineral interests are a form of real estate. There are two ways to transfer real estate from one party to another, by gift or by sale. In order for a sale to be valid, something of value must be exchanged for the property. This is something of value is known as consideration, and in our case is whatever it is we are paying you for the property.
The first paragraph of our Conveyance states: "in consideration of the sum of Ten and more dollars ($10.00) cash in hand paid and other good and valuable consideration."