start in the minor road off the b4011 sign posted brill near boarstall, at the 42nd kerbstone from signpost for brill gr sp 633144 proceed north east along the lane to the first crossroad junction (give way) and turn left 1.2 miles m1 go up and over muswell hill to the junction with the b4011 turn left. 2.6 m2 in oakley turn 1st left after the church into brill road 5.3 m3 at the t junction at the top of the hill turn right (care give way) 6.65 m4/5 follow down hill to the first left turn to chilton/chearsley/aylesbury and turn left 8.73 m6 continue through chilton village and turn left at the top of the hill. sp chearsley 10.18 m7 in chearsley turn left sp waddesdon. 12.3 m8 at 1st cross roads turn left to ashenden. 13.6 m9 continue through ashenden to westcott, and turn left (care) on to the a41. 18.3 m10 follow the a41 to the junction on the left sp thame b4011 and turn left. 25.3 m11 at top of switchback, and at right bend go straight on (dark lane) sp brill 28.8 m12 go up and down muswell hill then up to brill and finish opposite the windmill. 30.4