looking for an ancestor

I am looking for an ancestor who died in HK in 1866. He was buried in 'the catholic cemetery of Hong Kong' and the tomb has been made definitive in 1883 I believe, at the same place. I have only a picture of the cemetery before the tomb has been renewed.

I am trying to use the details around to find the place, pecularly the gate behind the cross.

Would you please help me find where is this place or to tell me wich cemetery it should be in 1866 ?

St Michael was not yet open when he died.

His name was Louis O'Mahony, he was chancellor at the french consulate.

Thanks in advance