Postcard image of at least three Mexican Insurrecto prisoners behind bars, being guarded at a jailhouse in Ciudad Juarez, Mexico. A man is seated outside the left side of the window; he is wearing a Mexican army-style uniform, including a large sombrero and a bullet ammo bandolier with a 5 round ammo clip. A woman is standing near the right corner of the window, looking inward at the prisoners. Handwritten note on the back: "Prisoners awaiting sentencing - Juarez Prison."

Report issued by the Bureau of Mines covering petroleum laws of the U.S. and surrounding oil producing countries. As stated in the preface, "this bulletin includes the petroleum laws of (1) United States; (2) the several oil-producing States; (3) Canada; (4) Mexico; (5) the Republics of Central and South America" (p. iv).

The Texas State Historical Association Quarterly Report includes "Papers read at the meetings of the Association, and such other contributions as may be accepted by the Committee" (volume 1, number 1). These include historical sketches, biographical material, personal accounts, and other research. Index is located at the end of the volume starting on page 329.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Mexicali in Mexico, including geographic features, buildings, and details related to risk assessment for fire insurance.

Patent for "improved filtering stuff composition" (lines 8-9), containing vegetable ashes and an insoluble binding agent for the purpose of purifying liquids.

Visa authorizing R. E. Denison of Texas to travel to Mexico for up to one year, starting May 1921. The front of the card has a partial photograph -- attached to the upper-left corner -- of Denison, wearing a suit and hat, standing in front of a large plant or tree. There is an official stamp from the consul general in Laredo, Texas on the front of the card.