All the “a's you've marked have something in common: they either stand alone, with no connection to the next letter, or they're linked in a curved line. Except for the first one, which isn't an 'a” at all, but the start of an “m”... see the other 'm's... but what ever - diedelideli, we've all got a theory 
why is the first ‘m’ so strangely curved? Because it’s harder to press the quill against the parchment...
why is the first ‘m’ so strangely curved? Because it’s harder to press the quill against the parchment...