...I could hear by his labouring breath that he was very blown... 
John Buchan 「Mr. Standfast」
...There are many who not only are qualified so to do, but are incessantly labouring to bring their countrymen to God...
Captain Frederick Marryat 「The Mission; or Scenes in Africa」
...Still we persevered, for we were, we knew, labouring for our lives...
W. H. G. Kingston 「The African Trader」
...That this is so, will, I think, seem absolutely certain to anyone who reads through the whole of this book carefully—indeed, they will arrive at that conclusion without my labouring the question...
Henny Kindermann Agnes Blake 「Lola」
...The maturity of the eyes, attained during the timeof preparation before deliverance, proves that the larva, far fromboring its tunnel in haste, has spent a long time labouring at it...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
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