I found him and his son (with a changed SIC name) arriving at Eliis Island in 1910 seven months after his wife passed away.
passengers arriving to the Port of New York from 1820 to 1957
First Name : David Max
Last Name : Mandelstein
Nationality : Russia, Hebrew
Last Place of Residence : Perth, Australia
Date of Arrival : November 5th, 1910
Age at Arrival : 50y
Gender : Male
Marital Status : Widowed
Ship of Travel : Saint Pau
lPort of Departure : Southampton
Manifest Line Number : 0024
First Name : Myron
Last Name : Mandelstein
Nationality : Russia, Hebrew
Last Place of Residence : Perth, Australia
Date of Arrival : November 5th, 1910
Age at Arrival : 9y
Gender : Male
Marital Status : Single
Ship of Travel : Saint Paul
Port of Departure : Southampton
Manifest Line Number : 0025