With further mucking around I have been able to share some pics from gmail to the pic app which then sometimes but not always puts the pic into the gallery app. The email app will not share anything. Also I have found now that if I open a pic in the pic app and share it with face book it will...
I have recently purchased a Nexus 10 and updated it to Kit Kat. Unlike my android phone there doesn't seem to be a way to save any pictures sent to me via the email app or gmail to the gallery app. When I tap on save as or save or download it says the pic or attachment is saved but there isn't...
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