Note 61 — Chapter I · JOURNEY FROM DARJILING TO TASHILHUNPO.
Reading edition
Three Tibetan tankas are the equivalent of one rupee. There were four varieties of tankas then current in Tibet, two of Nepalese minting, two made at Lhasa, the best being that known as Gadan tanka, and made at the Castle of Gadan.—(W. R.) ↑