You need to see the death certificate.
674/1889  MERRICK  David  parents Samuel / Sarah A  @ Sydney (died 22 Apr)
675/1889 MERRICK  David  parents Peter / Elizabeth @ Sydney     (died 20 Apr)
SMH 23 Apr 1889
https://trove.nla.gov.au/newspaper/article/13730248?THE FRIENDS of Mr. SAMUEL MERRICK are informed that the Funeral of his late deceased
BROTHER will leave his late residence, 160, William street, Woolloomooloo, THIS (Tuesday) AFTERNOON, at half past 2 o'clock, to Waverley Cemetery.
Birth certificate for Jane Susan Merrick born 6/8/1870 would record name, age, occupation and birthplace for father, David MERRICK.