Marler made the first of his 23 Test appearances against the Springboks .
They left a lasting impression , but the Marler refuses to be cowed by them or any of the southern hemisphere heavyweights .
Marler made the first of his 23 Test appearances against the Springboks and they left a lasting impression , but the loosehead refuses to be cowed by them or any of the southern hemisphere heavyweights .