We know that there were 2 older sons of Frederick - Jacob and John - who were old enough to be living away from home at the time of the 1841 Census and who subsequently emigrated to Australia aboard the INDIAN .  They did not keep in touch through some problem.  This is alluded to in John’s letter home of 28 Sep. 1879.  John appears to have become quite successful farmer and local identity in Huntly, Victoria.  His family tree is a follows;

John        Died 31 Dec. 1888 from Chronic Asthma and Dropsy.  Duration 2 yrs.
                Buried 2 Jan. 1889 White Hills.

married Phoebe HARRISON

1845	Willoughby
1847	Ellen
?	John  (died young)
1855	Mary
1857	Frederick
?	Julia (died young)
?	Richard (died young)
1863	Alice
1865	Emma
1872	George

Only known family after here is George;
 
 

George	Children	Children	Children
m. Christina Otile Stranch	Frederick John George  died 1962
	m. unknown	Julie
		Bryan	1 girl 2 boys