The first photograph in APCAT is one of the most infamous “alien” photos, sometimes referred to as the "Silverman".
This photo was been discussed in several books and publications since 1950 onwards.
Most websites which feature this photo contain few, if any, of the details known about this photo. For example, at the link below the photo appears in a section entitled "ETs, genuine : The following pictures are most likely 100% authentic". On that webpage it has a caption "1949, New Mexico. Source and story unknown, but probably authentic. It can not be excluded the small being that can be seen is not of extraterrestrial origin": http://thebiggestsecretpict.online.fr/ufo_et.htm
A copy of this photograph appears in UFO documents released by the FBI .One resident of Winchester, Virginia forwarded a copy of the photograph to the FBI in 1967 and a response dated 3 October 1967 sent in the name of J Edgar Hoover stated "I can assure you the photograph you mentioned does not represent employees of this Bureau" (FBI., 1967). The same letter also states that "the investigation of Unidentified Flying Objects is not and never has been a matter that is within the investigative jurisdiction of the FBI" - a statement that was rather misleading given the FBI's prior involvement in investigating UFO reports which has been demonstrated by other documents released by the FBI.
Putting together information from various sources, this photograph appears to have been:
(1) published in the German newspaper [magazine?] Neue Illustrierte (on page 3 of the edition published on or about 1 April 1950, with the title "Der Mars-Mensch").
(2) admitted to have been a hoax / joke just a few days later. This admission has very rarely been mentioned in discussions of the photograph online or in print.
The history of the publication of this photograph in UFO books and publications tells a rather sorry tale. Some correct information has appeared in a few publications but not been disseminated while, on the other hand, false information in popular books has been repeated.