Zara Phillips delivered a good performance on her Olympics cross-country debut at Greenwich Park to keep Great Britain firmly in medal condition.
The Queen's granddaughter was watched from the main arena stands by the Duke and Duchess of Cambridge, Prince Harry and the Duchess of Cornwall.
The 31-year-old former world champion produced a clear round inside the time, completing a course that claimed its fair share of casualties.
Seven of the first 27 combinations fell and were eliminated, but Phillips kept control all the way around a testing track that was very slippery in places.
Five combinations were clear inside the time as the competition entered its second half - Phillips, Wilson, Germany's Ingrid Klimke, Sweden's Sara Algotsson Ostholt and Australian Christopher Burton.
Phillips finished on her dressage score of 46.10.