In the 1910s, a San Francisco publisher named Edward H. Mitchell published staple-bound booklets of ten post card formatted “views” of various places.
One could tear out each perforated card and send it individually or, better yet, send the entire booklet to someone in the envelope in which the booklet came and that was configured for mailing.
As shown in the photo named “Album,” one of these booklets was an “Album of Views of the State Farm at Davis, California.”
The photo labeled “Envelope” shows the album in the envelope supplied with it.
As seen, it was sent to Mrs. Bertha Stanton in Antioch, Illinois by B. C. Stanton in Davis. The person from whom I purchased this item on e-bay says that these two people are his great grandfather and great grandmother. Mr. Stanton had come to Davis to study farming and sent this booklet to Mrs. Stanton. She was a stamp collector and tore the stamp off. Otherwise, the booklet and its envelope are remarkably intact.
I have reproduced the ten postcards in the order they appear in the booklet. The better to show this remarkable item, I have photographed the postcards as pages rather than decontextualize them as scanned images. Enjoy.