"There are no clues on the photo - on the back is written '23', 'Jan' (or Jun) and 'Col' (on three separate lines) - it can't be 1923 (she's more like 19 than 9!), so that doesn't help. Sorry"

"21st July 1935"

"Any idea when this was taken?
Mom reckons it was before nan was married but wasn't sure how old she would have been."

"This shot would be practically impossible in summer - within minutes some over-protective parent of a toddler, paddling in the pool, would be waving their arms and yelling 'pervert'."

"Uploaded at slightly higher resolution, the best way to view this image is not in 'Full screen/Slideshow' mode but to close the info panel on the right using the '>>' tab (top-right) and click on the magnifying glass you can then drag the 'magnified view' left or right to suit. An alternative would be to download the image and view it off-line (eg using Picasa Photo Viewer). The original stitched image contains about 15 times more detail and can be found at Panoramio (and maybe Google Earth)."