The Age newspaper office picnic about 1900
Back row 2nd from left: Albert Gleadow Winduss
Back row 3rd from left: Alberta Frances Winduss (nee Johnson/Jansen)
Also in the back row based on resemblance in another family photo are probably:
Back row 3rd from left: Sarah (Jane) Johnson (nee Exell)
Back row 4th from left: William Exell Johnson (1905 - 1935)
Albert Gleadow Winduss was a compositor with "The Age" newspaper.