Complex sentence: In the early summer of 1982, Larkin Arnold was anxiously awaiting word on Marvin's album but when no responses came in, he visited Marvin again in Belgium to see what was up with the album.
Split into simpler sentences: In the early summer of 1982, Larkin Arnold was anxiously awaiting word on Marvin's album. When he received no responses to his inquiries, he visited Marvin again in Belgium to learn of progress with the album.