Whereas, the Secretary of the Interior has heretofore approved an oil and gas mining lease, dated ---------, entered into by and between C. D., lessee, and

A. B., lessor, conveying the following described lands in the County of --------,

State of ---------:

Now, therefore, for and in consideration of --------- dollars, the receipt of which is hereby acknowledged, the said C. D. hereby bargains, sells, transfers, assigns and conveys all the right, title and interest of the said lessee in and to said lease, subject to the approval of the Secretary of the Interior, to E. F., said assignment to be effective from date of approval hereof by the Secretary of the Interior.

In witness whereof, etc.

See references under 5 3791.

For form of oil and gas lease, see Sec. 3887, 3888.