When Kate took the photo of Molly below (right, in case you weren’t sure!) she immediately remembered having taken a similar photo of Isabel some eighteen months ago, or so. She therefore suggested we put them side by side as a comparison.
For the record, the photo of Isabel was taken (we think) in September 2005 when she would have been around 4 months old. The one of Molly was taken in February this year (according to the properties of the file on the computer) when she was about 5 weeks old.