Actually, yes, the specifics of the First Contact have long been established. From page 38 of IST:
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Then the horns kicked in...
...and my shoes began to squeak.
Quote:In June of 1987, four subjective months after its launch, one of the primitive Meeranar probe ships crash-landed in the River Thames several miles upstream from London, England. Besides the British Army, IST London was on hand to greet the awakening of the Meerananr ambassador, his excellency Lord Rheergar ss'shemmrar, Scion of Clan Tsamyiann, late of the court of Sssheemiaou IV, hereditary queen of all Meeranon.-- Bob
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Then the horns kicked in...
...and my shoes began to squeak.