Greg Jefferys has a degree with majors in History and Archaeology from the University of Queensland a Masters Degree in History from the University of Tasmania and is currently in the process of completing a PhD.
Apart from his important work on the Stradbroke Island Galleon mystery Greg has discovered and identified two other "mystery shipwrecks" on the South East Queensland coast. He has also written on several maritime mysteries including the controversial shipwreck on Long Island in the Whitsunday Group and the loss of the whaler "George" on Lord Howe Island.

The Stradbroke Island Galleon DVD contains amazing, never before published images of the team's work. See images of ancient artifacts found on hidden sand islands deep in the 18 Mile Swamp. Images of the incredible plants and animals  that inhabit the 18 mile Swamp. The artifacts, including a 1597 silver coin, may well have come from the survivors of the Stradbroke Galleon shipwreck; a sailor's dirk, a Brass 17th century Spanish Walking stick handle, the blade of a Spanish rapier were found near the coin. Spanish gold coins were reported to be in possession of certain Stradbroke Island Aborigines in the early 20th Century. Also a huge collection of ancient maps of Australia and Straddie
Dr. Cliff Rosendahl is a medical practitioner who runs his own practice in Capalaba in Queensland. Apart from his skills as a GP Cliff  has developed his great interest in skin disorders, their study, early detection and treatment and now has a PhD in Science in that subject.
Cliff is the team's photographer and cameraman. Most of the still images in the book and on this site are Cliff's work.
Cliff also directed and filmed the movie length DVD
The Lost Galleon.

Brad Horton is a marine engineer running his own business. He has recently reconstructed a 35 metre aluminum twin hulled ex-North Sea fuel carrier, turning it into a high speed passenger and cargo vessel. Brad also has had a long and successful career as an open ocean high speed motor boat racer.

The Stradbroke Island Galleon DVD by Cliff Rosendahl is a full length documentary which takes you into the Swamp in search of the Galleon and introduces you to the main Greg, Cliff and Brad, all long involved in the search as well as the history of the galleon search.

   Brad Horton        &     Greg Jefferys
  Doctor Cliff Rosendahl
The Legend of the Stradbroke Island Galleon
We usually had to use a machete to cut our way through the thick undergrowth that blocks the trackless Swamp. Thats me with my favorite machete.
Its also some comfort to be holding a long sharp blade when you cross paths with a tiger snake. In the background  Brad waits for me to clear the path
Of course one does have to be carefull when swinging a sharp machete around.
That's my knee not a branch
Fortunately we have a fully qualified medial doctor with us.
And better still he has brought his surgical instruments with him.
"It does need stitches.but this will do for the moment," says Dr Cliff as he prepares for field surgery
As it turns out we discover that tea tree knees, used in the old days for making a boat's bow keel, also make good hospital beds when you are standing in 60 centimeters of Swamp water several miles from any form of transport with the sun sinking in the west.
Cliff is not too certain just how sterile his handkerchief is but its all we have!
Brad and Cliff cut me a walking stick and then push on through the swamp to reach Freshwater Creek.

Fortunately I missed the major arteries and ligaments with my mighty machete blow but  I still can not walk very well with the skin flapping around my kneecap and and could not make the journey back through the nearly 2 kilometers of deep Swamp to the Main Island Freshwater Creek is about 500 metres away but the tide is dropping. How to get me out of the Swamp to Cliff's surgery where he can stitch me up properly is a bit of a problem.
Brad and Cliff tell me when they return that they have thought of a cunning plan.
. they will leave  me to walk to the creek while they do a forced march back to Slipping Sand to get the punt which they will use to try to reach me coming up Freshwater Creek via Swan Bay. Its a race against time and tide as the sun is sinking and the tide is falling. If they don't make it in time Swan Bay will be a vast sand flat which they can not cross.
I hobble to the creek, it takes me about an hour and a half to make the 500 metres through the Swamp following the path cut by Cliff and Brad. I find a mangrove tree on the bank of the creek and sit there watching the tide drop and the shadows lengthen, hoping they can reach me before night, there was nowhere dry to sleep if they didn't; I'd have to sit in a tree  and wait for the next high tide at about 2 a.m. in the morning.