The Nuttall Encyclopedia
A Chinese money of account of varying local value, and rising and falling with the price of silver, but may be approximately valued at between 6s. and 5s. 6d. The customs tael, equivalent in value to about 4s 9d., has been superseded by the new dollar of 1890, which is equal to that of the United States.
Wood, James, ed. Entry for 'Tael'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/t/tael.html. Frederick Warne & Co Ltd. London. 1900.