Princess Anne, King Charles’s younger sister, has returned to her Gatcombe Park estate after spending five nights in the hospital.

Anne, 73, suffered a head injury on Sunday and was transported to Southmead Hospital in Bristol, west England.

Though the exact cause of the injuries is unconfirmed, there were horses in that area of the estate. Her medical team said that her head injuries were consistent with a potential impact from a horse’s head or legs.

Anne is married to Tim Laurence, a retired vice-admiral in the navy, and she has two children, Zara Tindall and Peter Phillips, from her previous marriage to Mark Phillips.

Laurence said earlier this week in public comments that the family was “profoundly grateful to the medical team and hospital support staff for their expert care — and to the emergency services who were all so wonderful at the scene.”

The injuries led to the cancellation of Anne’s planned trip to Canada beginning June 30, and it was not clear on Friday when she would return to public duties.

The princess, one of the most popular members of the Royal Family, according to polls, stepped in to take more duties in light of Charles’s cancer diagnosis, which was publicly revealed in February.

Anne’s love of horses is well-documented and she won a gold medal in the 1971 European Eventing Championship, while she competed at the 1976 Montreal Olympic Games as a member of the British equestrian team, becoming the first royal Olympian in the process.