Boring Answer Alert!!!!

Because 'old' is an adjective and therefore on this occasion takes the inflective 'e' as 'trip' is being treated (incorrectly in my view) as a feminine noun, whereas 'trip', as a noun, doesn't require an inflection.

I agree, the 'Ye' should read 'the'. For those who suffer from insomnia, see http://en.wikipedia.org/wiki/Thorn_(letter)