In the music manuscript books of Dr John Clague of the Isle of Man ( 1842-1908) is a tune - without words - under the heading "If Young Men Could Swim". It was collected from George Moore of Balladoole in the south of the Island.
Undoubtedly it's a tune for a version of the song best known as "Hares On the Mountain"
In 1988, to mark the 80th anniversary of Clague's death a small book of songs based on his manuscripts was produced, in which the words - in English - of "Hares on the Mountain" appeared opposite a singable version of the song - in Manx - produced by adopted Manxman Colin Jerry.
In recent years with an increased interest in and promotion of the Manx language, the song has proved quite popular.
Here they are :-

1 If all the young girls were like hares on the mountain (x2)
   How soon the young men would all go a-hunting,
   To my right fol-the-diddle dero, to my right fol-the-riddle dee.

1 Nee caillinyn roie myr mwaaee er ny sleityn (x2)
   Dy beigns agh my scollag de leah harrin cloghey,
   Di-dal-dol deree diddle dero, deedle-dal-deree dee.

2 If young girls they sang like birds in the bushes (x2)
   How soon the young men would go beating those bushes
   To my .........

2 Gowee caillinyn arrane myr eanlee ayns ny thammagyn (x2)
   Dy row mee my scollag harrin bwoailley ny thammagyn,
   Di-dal ............

3 If all those young girls they flowered like roses (x2)
   How soon the young men would go pruning the roses,
   To my ............

3 Nee caillinyn blaaghey myr roseyn bwagh jiargey (x2)
   Dy beigns agh my scollag raghyn giarey ny roseyn,
   Di-dal ............

4 If all those young girls were like ducks on the water (x2)
   How soon the young men would dive in and swim after,
   To my ............

4 Nee caillinyn snaue myr thunnag 'syn ushtey (x2)
   Dy row mee my scollag harrin snaue geiyrt orroo,
   Di-dal ............

5 If young girls they sparkled like dew on the barley (x2)
   Young men would be there to gather dew early,
   To my ..........

5 Nee caillinyn skelley myr druight er oarn appee (x2)
   Dy beigns agh my scollag raghin rouail ayns ny magheryn
   Di-dal ..........