I found a Charlotte Prior in the Berkshire Burial Index who seems to fit the bill -
buried Appleford SS Peter & Paul 21 April 1870 age 79
but I couldn't find an 1886 burial for a John Prior (of any spelling variation).
Jill
Logged
See Surname Interests Table + Major brickwalls: John Frith mge to Fanny, Bucks? c 1798 Bathsheba Boothroyd bp W Yks c1802 John Bishop bp E Yks c1758 Joseph Symonds mg to Sarah, prob Berks c 1735-40 John Horwood mg to Martha, Berks c 1735-40 Sarah Sculler bp Berks area c 1675 Paul Phillips bp Berks/Bucks c 1720 William Newell bp Berks/Bucks/Oxon c 1765 Richard Troughton mg to Jane, Westmoreland c 1732 Mary Simon bp Shrops c.1795