Here you can download the following sample letters:
Sample letter 3.1: American style
Sample letter 3.1a: American style
Sample letter 3.4: American style
Sample letter 3.5: American style
Sample letter 3.7: Combination of British style (punctuation) and American style layout
Sample letter 3.7a: Combination of British style (punctuation) and American style layout
Sample letter 3.8: British style
Sample letter 3.9: British style
Mrs Davidson's letter