No mention of a Mrs. King in the death notice -
The Argus - 29 August 1890
BENJAMIN.—On the 27th inst, at his residence, 9 Albert- Road, South Melbourne, Isaiah the beloved husband of Elizabeth Benjamin, and fond father of Albert A. Benjamin of Swanston Street; Mrs.Joseph Davis of Sydney,Mrs.David Dyte of Hawksbury, Mrs Henry Benjamin, South Melbourne; Alfred Benjamin, Traralgon; and Edward and Leopold Benjamin of Fiji.