Entire 1849 London to Fritwell with Kensington 1d Paid in red. Interesting contents re cholera

Entire 1849 London to Fritwell, with “Kensington 1d Paid” 2 line stamp in red, and London double rim Paid stamp dated JY 27 1849 code FP in red. Backstamped by double rim Oxford CDS dated JY 18 1849 code A in blue. An interesting letter between brothers re their father’s condition, as he appears to be suffering with Cholera