Thanks @loveyouradvice its not particularly accurate due to fat fingers and tired eyes!
@IdisagreeMrHochhauser i agree, if he took a path from Pedi marina it would likely be the most easterly of my blue lines. I get the impression the friends live east of Symi on the other side of those hills, where I marked red again.
What puzzles me is how he’d know all this having only just arrived on the island. Did he have a paper map? Had he been there before?