Count Jerome was the eldest surviving son of Peter De Salis and his third wife, Ann, daughter of Bundespresident Antonio de Salis.
His paternal grandfather was Jerome, 2nd Count de Salis.

Born in Chiavenna on 14 February and baptised at Soglio on 17 February 1771, he died on 2 October 1836 at Dawley Lodge, Harlington, and lies buried in the ancient church of St Peter and St Paul, Harlington, London, which was at the time in Middlesex.

In a letter of 1830 he proposed spending the winter in Madeira whence:
'...should the Antichrist appear next year, I can easily get a passage to Chilli... by the dream I had in 1815, or rather a waking vision during an illness I had in Dublin, the application of aerial navigation to military operations will be a sign of the coming of the Antichrist.'

De Salis was a friend of Samuel Wix, the high-churchman, and paid for his Reflections concerning the expediency of a council of the Church of England and the Church of Rome being holden, with a view to accommodate religious differences (1818) to be translated into several languages.
Count Jerome was the eldest surviving son of Peter De Salis and his third wife, Ann, daughter of Bundespresident Antonio de Salis. His paternal grandfather was Jerome, 2nd Count de Salis.
Born in Chiavenna on 14 February and baptised at Soglio on 17 February 1771, he died on 2 October 1836 at Dawley Lodge, Harlington, and lies buried in the ancient church of St Peter and St Paul, Harlington, London, which was at the time in Middlesex.
In a letter of 1830 he proposed spending the winter in Madeira whence:
'...should the Antichrist appear next year, I can easily get a passage to Chilli... by the dream I had in 1815, or rather a waking vision during an illness I had in Dublin, the application of aerial navigation to military operations will be a sign of the coming of the Antichrist.'
De Salis was a friend of Samuel Wix, the high-churchman, and paid for his Reflections concerning the expediency of a council of the Church of England and the Church of Rome being holden, with a view to accommodate religious differences (1818) to be translated into several languages.
Jerome, 4th Count de Salis-Soglio