Biographical notes:
Migrated from Cornwall on the Royal Admiral arriving Port Adelaide, SA, AUS on 18 Jan 1838. Her 2nd child, Samuel, was born during the voyage. Her parents, William & Elizabeth, & her siblings sailed on the same vessel. The Royal Admiral was a barque of 414 tons, registered in London. It left Falmouth on 26 Sep 1837 with 205 passengers including 112 Cornish emigrants.
Other branches of family: Jacka & Pemberthy of Redruth.
Emma is probably the Mrs Tyrrell in the photo of wives taken after the Old Colonists Dinner of Dec 1871, located at 5y. The photos were taken progressively over about 8 years.
Reference documents:
1815 baptism record.
1832 marriage record.
1903 death announcement (The Advertiser).