Great grandmother in Australia - date the photograph please

[SkySteve]

Thanks for the replies all.
Ruskie, if this helps this is a photo of Margaret taken with her son George who was born in Feb 1911 when she was 41.
He looks about 8 or 9 to me.

Both this and the photo in the original post have identical handwriting on the back referring to 'myself' so I'm certain they are both the same person.

[Gadget]

I'm not sure that the lady on the first photo is the same as this one 

[Treetotal]

I too have my doubts 
Carol

[IgorStrav]

Very difficult to believe that these can be the same lady at roughly the same time.....

Not doubting your handwriting evidence, Steve, but I don't think the hairstyles, body shape, or indeed style of dressing is the same.  Added:  or neck

[SkySteve]

Interesting, thanks again folks, I've been going wrong here.
This is the other lady riding on the trap (handwriting referring to 'myself' identical on the back of both photos.
This must be the one in common to both and not Great Grandmother Margaret.  I'll separate the posts so the photos don't get mixed up.

[SkySteve]

Thought it was the same handwriting on both photos but could easily be wrong.
Assumed it said 'George' at the top left but not sure now.

[SkySteve]

Now this is where I've been going wrong.  This photo is of Margaret taken Oct 1915 with a message on the reverse to her son Joe (my grandad).
Margaret was 46 then so did look good for her age.

The handwriting is different to the other two so I now know the lady in the mirror is not Margaret.

Thanks for you help.

[Ruskie]

_{I'm afraid I'm a bit confused ....}

I will try again later. 

[SkySteve]

Apologies, just posting this has made me look again and challenge assumptions. Prompted by another family member the original photo now looks more like it's Margaret's daughter, born in 1894.
That would make her in her mid twenties which fits in nicely with the suggestions made.