We have to work by candlelight.
The house is by the lake.
I live by the River Thames.
You must leave the hotel room by 11 a.m.
Can you finish the work by five o`clock?
I will send you the report by fax.
Let`s go by car.
to travel by night
I will have it done by tomorrow?
to travel by day
Please send us the contract by Friday.
I went to London by train.
We live by the airport.
Contact us by phone.