Spencer John Skipper (c. 1848 – September 1903) was a journalist in South Australia who wrote and drew using the pseudonym "Hugh Kalyptus".
Skipper was born in South Australia a son of solicitor and artist John Michael Skipper (18 June 1815 – 7 December 1883) and his wife Frances Amelia Skipper, née Thomas (c. 1818 – 27 February 1855), whose father was Robert Thomas, founding editor of the South Australian Register. His father emigrated to South Australia aboard Africaine and around January 1837 painted the scene of the Proclamation, to which he had been a witness. It shows The Old Gum Tree and Gouger's tent and hut, supporting the conventional view that the bent tree is the genuine site of the ceremony.
He was educated at John Lorenzo Young's Adelaide Educational Institution and studied for the Law. He was an occasional contributor to the E. R. Mitford's satirical magazine Pasquin (1867–1870).
He worked for The Portonian from 1871 to 1879 alongside John Eden Savill, better known as a racehorse owner.
He joined the literary staff of The Register, and after the death of shipping reporter Richard Jagoe in 1894, he was appointed to that position, which he held until a few weeks before his death. An avid member of the Volunteer Force, he was also the unofficial reporter on the peacetime activities of South Australia's militia. He also served as the paper's arts critic.
Skipper was associated with John Howard Clark, whose clever satirical column "Echoes from the Bush by Geoffry Crabthorn", which ran from 1867 to 1878, he emulated in "Echoes and Re-Echoes" in The Evening Journal and The Adelaide Observer under the nom de plume "Hugh Kalyptus" from 1882 to 1903.