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| Parramatta River in Parramatta Park | 
A useful map showing a walking route along Parramatta River, mostly within Parramatta Park, can be viewed on '
Step Where'.
 - thanks to contributor 'MnM'
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| The Governor's Dairy - Parramatta Park | 
The two front rooms of the Dairy Cottage (above) were built by an ex-convict, George Salter and represent the earliest surviving worker's cottage in Australia. The Cottage was sold to Governor Macquarie in 1813 and was converted to a diary by the addition of two wings.
The Parramatta Park Trust run 
tours of the dairy twice a month. 
 
Transit stones (left) from the 
Parramatta Observatory  built in 1822 by Governor Thomas Brisbane, who was a keen amateur scientist.
It is not far from Old Government House, and was used by early  astronomers and surveyors before it's demolished in 1847.
There is a marble memorial obelisk and an information display nearby, and the Park Trust is currently working to conserve the site.
I have read that Sydney Observatory, houses relics from Parramatta including a telescope and clock.
The surveyor Thomas Mitchell used these transit stones, which supported a transit circle telescope, as the initial mark for the first trigonometric survey of Australia (1828)
A detailed history of the observatory  can be found on Andrew James Southern Astronomical web site
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| Macquarie St Gatehouse | 
Parramatta Park has six gatehouses including the Macquarie Street Gatehouse (above) and the much photographed Tudor style 
George Street Gatehouse.