Anyway... firstly, what does Gumbramorra mean? I still don't have an answer to that!
OK, disappointing - but maybe someone will chip in one day and answer that one.
So, secondly, where do I think it was? I've written a detailed post on this already (drawing heavily on Chrys Meader's work, see that post for details) but in short it was hemmed in by foothills and escarpments to the north, east and northwest. That's incontrovertible, based on topography. It extended from the Cooks River mudflats and saltmarsh of Tempe, where the Gumbramorra Creek joined the Cooks River in the south, to a north-western extent along what is now Sydenham Rd. It possibly at its greatest extent reached west to Livingstone Road (both Sydenham and Petersham Roads were once and variously known as Swamp Road, so it likely extended some distance) but must have narrowed considerably as it expanded west. The northern and western edge was blocked by the rising land to the north, including that along Illawarra Road, forcing the swamp to form an edge at Sydenham Road around to Victoria Rd, and probably northwards as far as Enmore Park. That flat, easily flooded area to the south and east of today's Victoria Road is now industrial land and lies at the core of the swamp. Partly, to the south, it was once the location of the tragically flooded estate of Tramvale (1889).
The Addison Road swamp is a little higher and to the north and west of that, although it clearly doesn't take much imagination to see the two systems merging in wetter years. The Addison Road swamp visibly lies in a depression between two ridges, draining to the east at, around, or just to the south of Enmore Park. Whether the Addison Road swamp was permanently connected to Gumbramorra Swamp is possible, if unlikely. More likely the connection dried up periodically. They are certainly connected, related systems, obviously so during the wetter years and seasons. But it's a stretch to say that Gumbramorra Creek itself flowed through (or under, if you like) the current community centre (as has been claimed). It was a swamp, it didn't really "flow" but it drained slowly to the east. In any case Gumbramorra Creek lies to the south of the primary swamp in that narrowing around Carrington Road and clearly emptied into saltmarsh and mudflats at Cooks River. It's then a question of where to put the headwaters and to name any feeder creeks - to the north, northwest or west. And I have no definitive answer on that!
Anyway, Marrickville Council has had a stab at mapping it (reference 4. below), with attribution as an adaptation of Benson et al (1999)..
Which is all well and good - it would have been a wonderful system for wildlife - but today is little more than an interesting set of concrete-lined drains, historic pumping stations and a massive (often empty) outflow pond ('Sydenham Storage Pit'). As well as losing this swamp, we also lost the marshes at Mascot, in an impressive feat of drainage and, ultimately, destruction. If that's progress, can we at least learn from it and leave (or restore?) a bit more of the natural world in our over-built urban environment, please?
Some references and further reading:
- Dictionary of Sydney on this subject: http://www.dictionaryofsydney.org/entry/sydenham
- Reasonable claim by Golden Barley Hotel to be at the head of the swamp: http://www.goldenbarleyhotel.com.au/history.html
- The Addison Road Community Centre also quite reasonably lays claim to be part of the Gumbramorra swamp: http://www.arcco.org.au/history/ but the claim about the creek location is less credible
- Marrickville Council has produced this booklet, 'Water Revolution', which includes a guesstimated map of the swamp. And again here for the Council's water strategy.
- A very good read by Sydney Water on the Carrington Road Pumping Station: https://www.sydneywater.com.au/SW/water-the-environment/what-we-re-doing/Heritage-search/heritage-detail/index.htm?heritageid=4571743&FromPage=searchresults and on Sydenham Storage Pit: https://www.sydneywater.com.au/SW/water-the-environment/what-we-re-doing/Heritage-search/heritage-detail/index.htm?heritageid=4571743&FromPage=searchresults
- Steam Tram rescue, 1889 flood: http://www.tramscrolls.com.au/2010/12/steam-tram-rescue/
- My previous post on Gumbramorra: http://www.secretsofasydneypast.com/2011/12/gumbramorra-swamp-or-sydenham-if-you.html
- My previous post on Addison Road: http://www.secretsofasydneypast.com/2009/12/addison-rd-centre-or-barracks-linked-to.html
- Local Land sales and more (my post): http://www.secretsofasydneypast.com/2009/12/charles-street-marrickville-and_27.html
- My post on Marrickville history: http://www.secretsofasydneypast.com/2009/12/charles-street-marrickville-and.html
- Another take on Marrickville History, by the local Heritage group: http://marrickville-heritage.blogspot.com.au/2012/10/marrickville-suburb-history.html
- My post on Cooks River history: http://www.secretsofasydneypast.com/2010/06/some-snippets-of-history-lime-mills.html
- My post on moving Cooks River to make Sydney Airport (part 1 of a series): http://www.secretsofasydneypast.com/2008/11/sydney-airport-part-1-1926-vs-1940.html
- And again, part 4: http://www.secretsofasydneypast.com/2008/11/sydney-airport-part-4-1966-vs-1940.html