This image depicts the Titanic at Cherbourg, France during her maiden voyage. Father Browne used this image during his later lecture series.
We learn about its source from Titanic Photographs:
An illustration of the Titanic at night, anchored off Cherbourg. This was used by Frank Browne for his public lectures and was taken from the supplement to The Sphere, London, 28 April, 1912.
Image online, courtesy Titanic Photographs.