A full account of the rise, progress, and advantages of Dr. Assheton's proposal (as now manag'd by the Worshipful company of Mersers, London,) for the benefit of widows of clergymen, And Others; By settling Jointures and Annuities at the Rate of Twenty per Cent. With Directions for the Widow how to receive her Annuity, without any Delay, Charges, or Deductions