St Olave's Church, Gateway, Hart Street, City of London, Greater London Authority, 1910-1950. The churchyard gate of St Olave's Church in Seething Lane. The gateway bears the date 1658 and was a favourite of Charles Dickens who called the churchyard "Saint Ghastly Grim" and recounted visiting it one night after midnight to see the skulls which adorn the gateway. The graveyard is said to be the burial site of Mary Ramsay, who is thought to be the woman who introduced the plague to London in 1665.