RMS Titanic Memorabilia Print paper ephemera images from Waterlow & Sons London

Unable to describe about my most valued possession of paper prints relating to RMS titanic Memorabilia. My most days starts with searching , understanding and dating/ageing , the history and facts behind this items.
What was the purpose relates to producing these prints ?
Are , these for Souvenir ?
Are, these for records or part of documents or part of books ?
Are, these for as postcards ?
There are four similar prints. On the back of one , inscribed, Reads, Waterlow & Sons, London England, Where as on other ,inscribed, Correspondence ( Nothing More ) & on remaining 2 ,Back is blank.
The terminology used to describe image on footer relates to RMS Titanic
amenities, Namely
1. First Saloon Smoking Room
2.First Saloon Music Room
3.First Class Dinner Saloon
4.First Saloon Lounge and Reading Room.

These prints are rectangular shape (postcard type) 15.0 cm x 9.6 cm. Thin paper ( not exactly like post cards , nor like paper Clipping ), back is blank but there is no reflection seeing from back.
Yes, though, no date is available on its body , nor direct reference as being part of Titanic, but there is no confusion to justify that these relates to Titanic and must be product of Circa 1900.
I valued this possession most unique and rare since these are part of history and its facts are subject to R&D. Frankly saying, collecting information about these items put me another interesting baskets of information's, most loving, exciting and informative.
Thanks