He made 8 appearances and scored 3 goals before moving back to the East Yorkshire club.
Overall, during 1961 to 1962 he made 7 league appearances, scoring 6 goals before moving to Walsall.
He played six games, scoring three goals before moving to Brazil.
The tall Estonian accommodated his new role well, scoring 19 goals in 20 games, before moving abroad again.
There, he scored a creditable 11 goals in only 13 appearances, before moving on to Southampton.
Armstrong scored 2 goals in 42 games for the new club before moving back to Sussex.
He made 124 appearances and scored eight goals before moving to Celtic in 2010.
In 35 games he scored 11 goals before moving to Hearts for £50,000.
Hearn then scored six in the 2008-09 season campaign before moving to Alfreton Town.
His stay was short however, as he scored once in 16 league matches before moving to Luton Town two months later.