You should be able to identify Nora if she is Hannah, by her birthday. Some mistranscribed surnames

I wonder if this could be the problem with finding Morris/Maurice's death registration. I can't find a birth reg for Michael.
FITZGERALD Garrat
1 Jan 1865
Father Richard FITZGERALD Mother Ellen HARTY
At Port Gawler PtG 34/648
FITZGERALD Hannah
21 Sep1869
Father Richard FITZGERALD Mother Ellen HERTY
At Port Gawler PtG 77/226
FITZGERRALD Ellen
2 Sep 1873
Father Richard FITZGERRALD Mother Ellen HARTY
At Alma Gil 129/11
FITZGERLD Richard
22 Jun 1875
Father Richard FITZGERLD Mother Ellen HARRTY
At Alma Gil V 153/419
FITZGERLD Catherine
7 Jul 1877
Father Richard FITZGERLD Mother Ellen HARTY
At Alma Gil186/56
FITZGERALD Morris
4 Jun 1883
Father Richard FITZGERALD Mother Ellen HARGY
At Adelaide Ade304/384
Cheers
Cando