Reading an old story by A. Blackwood, I am unable to decipher the sentence in bold:
He had told no fearsome story. He had evaded, indeed, many openings expressly made for him, though fully aware that to his well-known interest in psychical things was partly due his presence in the week-end party. “I never have experiences—that way,” he said shortly when some one asked him point blank for a tale;
I am confused by the "to" preposition as well as the usage of "due" - to me, it seems as if there were some words missing.