Sidney H. Sime: A Timeline of his Life
| Year | Events |
| 1867 | Birth (uncertain; may have been as early as 1865) to a poor family in Manchester. Sime was one of six children. |
| 1889 | First picture exhibited at the Royal Academy Summer Exhibition |
| 1895 | Sime joins the staff of Pick-Me-Upmagazine as an illustrator. |
| 1896 | Invited to contribute to The Idlermagazine, edited by Jerome K. Jerome. |
| 1897 | Sime's 'From an Ultimate Dim Thule', a series of bizarre drawings, begins to appear in The Idler. |
| 1897-8 | Edits Eureka magazine. |
| 1898 | Marriage to Mary Susan Pickett.Sime inherits money and property from a rich uncle, enabling him to move to Daldrishaig, in Perthshire, Scotland.Paints a number of Scottish landscapes. |
| 1899 | Purchases The Idler, and becomes editor. |
| 1904 | First Introduction to Lord Dunsany. |
| 1905 | Sime disposes of the unsuccessful Idler, selling the goodwill for only £5.00. |
| 1907 | Frontispiece for Arthur Machen's The Hill of Dreams. |
| 1909 | Frontispiece for William Hope Hodgson's The Ghost Pirates. |
| 1910 | Set and costume designs for Maeterlinck's The Blue Bird |
| 1908 | Provides illustrations for The Sword of Welleranby Dunsany. |
| 1913 | Set and costume designs for Ibsen's The Pretenders |
| 1914 | Outbreak of World War One. Sime enlists; spends time in Army Service Corps on the East Coast of Britain. |
| 1917 | Provides illustrations for Tales of Wonderby Dunsany. |
| 1918 | Invalided out of army with duodenal ulcer on Armistice Day. |
| 1919 | Provides illustrations for The Gods of Peganaby Dunsany. |
| 1923 | Provides illustrations for Time and the Godsby Dunsany. |
| 1924 | Provides frontispiece for The King of Elfland's Daughterby Dunsany. |
| 1927 | Sime holds one man show at St. George's Gallery. |
| 1930 | Publishes Bogey Beasts, a set of nonsense drawings reminiscent of From an Ultimate Dim Thule, with accompanying songs and music. |
| 1936 | illustration for My Talks with Dean Spanley by Dunsany. |
| 1941 | Dies in Guildford on the 22nd May. |