A man from Jersey who thinks he could be the late Princess Margaret's son will have to wait for a decision on whether he can see her will.
Mr Brown says a secret meeting took place the day he was born
The Lord Chief Justice has reserved his judgement in Robert Brown's appeal to access papers which have been sealed.
Mr Brown, a 53-year-old accountant, said it was another step along the way, although he was becoming "increasingly frustrated" at the delay in his case.
It is expected to be several weeks before any decision is made.
Mr Brown believes his father may have been Group Captain Peter Townsend, who was engaged to Princess Margaret.
The princess called off the wedding to the divorced former RAF pilot in October 1955, basing her decision on the Church's teaching that Christian marriage was indissoluble and on her duty to the Commonwealth.
Mr Brown was born on 5 January 1955 in Nairobi, Kenya, but his birth was not registered until 2 February. The birth certificate gives the date he was born as 4 June 1955.
He also believes a mystery Privy Council meeting was held on the day he was born.
If the princess, who died in 2002 aged 71, is Mr Brown's biological mother, he would be 12th in line to the throne.
A previous attempt to access the wills of Princess Margaret and the Queen Mother was blocked by judges who said orders to seal the documents should remain in force.
Mr Brown's appeal is opposed by executors of both estates and the Attorney General, Lord Goldsmith.