Iolanthe is a heritage-listed former residence and post office located at 691 Pacific Highway in the Sydney suburb of Gordon in the Ku-ring-gai Council local government area of New South Wales, Australia.

[1] In 1860 residents of Lane Cove, (present Gordon area), petitioned the Postal Department successfully for a local post office, Previously letters, papers etc.

he was instrumental in having the railway constructed to Old Hornsby (Pearce's Corner) and particularly in having a rail station established at what came to be called Killara.

[1] Miss Eliza (who preferred Elizabeth) Edwards was appointed Post Mistress, with a salary A£12 per year.

[1] Miss Edwards report in the 1880s says 'from Chatswood to Pearce's Corner (Wahroonga) people rode or walked or sent for their mail.

[1] In 1887 as the construction of the railway from St. Leonards to Pearce's Corner, Miss Edwards made an application to the General Post Office to include the sale of money orders in view of changes to come with the population increase, since they were situated near the approved site of Gordon Station.

As a post office from 1860 to 1894 it played an important part in the everyday lives of early settlers of the North Shore.

The cottage's is directly associated with the Pymble and Edwards families whose members were prominent pioneers in the development of the North Shore.