...Aneatly-cut circular hole, about the size of a rupee, on thelower surface or the side of a branch is assuredly the entranceto the nest of a coppersmith, a green barbet, or a woodpecker... 
Douglas Dewar 「A Bird Calendar for Northern India」
...In houseswhere there is a new bride or whence a bride has gone, or where ason has been born, it is usual to give a rupee and a quarter, orsome cloth...
Sir James George Frazer 「The Golden Bough」
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