Under the pen name Cosmo Setepenra, Long wrote in the book that he had a "spiritual revelation" while in college and soon sold his cars and gave away his "material possessions," packing just two suitcases for a trip to Africa -- his "ancestral homeland." He wrote that he traveled across the continent learning from its "native spiritual practitioners and elder holistic healers" and was concerned in particular that people with darker skin lead healthy, holistic lifestyles.
"Not only have we not been taught how to treat our bodies and spirits in order to live a healthy and holistic lifestyle, we have also lost touch with the ancient teachings of our spiritual elders that would help us to live a healthy holistic life in harmony with nature," he wrote.
http://www.nola.com/crime/index.ssf/2016/07/gavin_long_what_we_know_about.html
I knew a guy that got out and went back to europe with a buddy from the service and rode the euro train for 6 weeks, sounds plausible to me that cosmo would/could have went to africa.