Terry, Terry, Terry
Just start here and let your mouse hover over all those things on the grey menu bar above the picture for a plethora of things to keep you interested
http://www.harness.org.au/index.cfm
Here is another one that you will love
http://classicfamilies.net/horsedetails.aspx
Type in Halwes in the Go box and select your 1959 mate from the options that appear
Then click on the
Purple DESCENDENTS tab you will see above his pedigree (and don't forget to click on all those little + boxes that appear)
Then go back and click on the
Brown OFFSPRING tab for a summary of his 'classic class' progeny - click on any one of them for more detail/pedigree for them (and then use your back arrow/key to return to the list)