If the small buys at 16.5c were interspersed with large sells at 16c, I would say somebody wanted out without bringing attention as the largest volumes would go through at 16c but for most of the day, the share price would stick to 16.5c.
From the course of sales posted, I can't see many large sells at 16c so that blows that theory of somebody sneak out without causing too much attention?