G'day Alison,Thanks for that - It sounds like they are an interesting set of flutes and I look forward to seeing the photographs.
BTW: I actually bought my first Chinese bamboo flutes and whistles to photograph them! They were used in a macro-photography assignment when I was studying photography and it was some time later that I got around to actually playing them.
Each of the flutes has a column of infilled Chinese ideograms below the embouchure or the mouthpiece, as well as a carved dragon or flower, but I presume this to be the manufacturer's or distributor's mark, particularly since many instruments have the same characters and they always start with the ideogram for China.
Regards,
Bob Bolton