Remarks on Some conjectures, relative to an antient piece of money : endeavouring to prove it a coin of Richard, the first king of England of that name : shewing the improbability of the notion therein advanced ... particularly and largely consider'd the standard and purity of our most antient English coins, the state of the mints, and the beginning of sterling, from the public records : to which will be added, an epistolary dissertation on some supposed Saxon gold coins read before the Society of Antiquaries /