Dear Robert,

rr> Thanks for starting the project off. I prefer 'Greater'
rr> over 'Bigger' ,as the translation for Mahaa, as I think it has a
rr> more elegant and formal ring.

Thank you, I agree.

rr> I'd like to know more about whether it is right to say 'a season' -
rr> rather than 'at one time' or 'on one occasion.' I guess you have
rr> good reasons.

It seems I was mistaken. I have found convincing elucidation of
'eka.m samaya.m' at Silakkhandhavagga-Atthakatha (1:32).
'Idha panassa kaalo attho.'

kaalo - time.

And at 2:365 -
Saavatthi.m upanissaaya yo jetassa kumaarassa vane anaathapi.n.dikena
gahapatinaa aaraamo kaarito, tattha viharati.

upanissaaya - near, in the vicinity.

So:

The Greater Instruction to Rahula

Thus have I heard. At one time the Blessed One stayed in the garden of
Anathapindika, in Jeta's forest, near Savatthi.

Regards,
Dimitry