Alister Clark exhibited a rose named 'Lady Rhodes' at the National Rose Society of Victoria's spring show in 1926 seven years before it was introduced into commerce in 1933. Lady Rhodes herself died in 1929. The rose exhibited in 1926 was described in The Australasian simply as "pink". The rose introduced in 1933 suggests a red to reddish pink. Although they are probably the same rose, the odd posthumous introduction makes me wonder if perhaps another rose other than the 1926 one was introduced as 'Lady Rhodes' in 1933.

Edited to add that a little further researching in the New Zealand newspapers database reveals that Clark introduced 'Lady Rhodes' in New Zealand before he did in Australia. His sister, Lady Rhodes, died in October 1929 and Alister Clark was in New Zealand in the first part of 1929 bringing with him material of the rose he named after her.

From the 'Thames Star' (NZ newspaper) of 14th March 1929, page 4:
"Over 50 buds of the seedling rose “Lady Rhodes,” raised by Mr. Alister Clark at Glenara Bulla . Victoria, and presented by him to the Canterbury Horticultural Society, have been brought to New Zealand by the donor. The rose is red in colour,' fairly full, lasts well on the plant, and in water, stands the sun well, and is deliciously sweet scented. The buds have been worked on specially prepared stocks by Mr. J. Poulsen, who anticipates having sufficient plants to meet all demands during the planting season of 1931. Blooms of “Lady Rhodes” will be exhibited at some of the society’s meetings next summer."

The fact that he provided so much grafting material to Poulsen in New Zealand suggests to me that it could have been a reason why the rose was delayed being introduced in Australia.