It seems like it may be from an "old" book. I did find it at the following website: https://wakandalegendbasenji.com/basenji-in-africa/ The site owner should be able to tell you something about where they found the photo.
Is Rocko a Basenji Mix?
Yesterday I got the honor of adopting this little beautiful boy from a local animal shelter. They really weren't sure what he was exactly breed-wise but people kept throwing breeds at me that they guessed he was and I was looking them up online. One of the ones that really struck me as similar to him (especially because of the wrinkles on his forehead and his extremely quiet nature) was the Basenji. So I decided to look up a Basenji forum because you guys are obviously the experts on the breed
What do you guys think? Is Rocko part Basenji?