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.
Merry Christmas to all Basenjis and their people
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From me and Butu in his Christmas sweater….
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Merry Xmas, Butu looks very cute, love the sweater.
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Merry Christmas to all Basenji forum people and their furry friends!
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Merry Christmas to those who celebrate it. Seasons greetings to all.
CUTE pics.
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Happy Holidays, Butu, and also to all the B Forum folks and furkids !!!