A few weeks ago, I came across a document written in the mid 1950s which contained an explanation of the qualities required of the ideal immigration officer. It spoke of a person who was well-read across a broad spectrum of current affairs, who had an interest in languages, who was alert and had an enquiring mind,who was self-sufficient yet someone who was always balanced, discreet and never overbearing or discourteous.
You just can't get the staff! (Especially on discretion, it's leaking like a sieve, time to put the lock back on the photocopier methinks)