A very early WW1 postcard - strongly showing th Ice Formation on Niagara Falls:

Headed O.H.M.S. posted home to Eastbourne Sussex cancelled with the orange machine LONDON F.S. PAID OCT 31 14 - cover shows the circle red cachet P.C. of the Postal Censor. 

Has the senders details:

C Twain

2nd Royal Sussex Rgt

British Expeditionary Forces

The 2nd Royal Sussex landed in France in August 1914. This card is likely to have been sent back by ship without entry into the Army postal system and then posted on arrival in England. 

Condition as shown:

ID: GB SX 24319