Old Spanish Trail Assn*, Mobile, Ala,
Dear Sirs:-
Find the better class hotels and garages throughout the country and you will find the Official Blue Book Sign hanging out in front.
It is the most familiar and most welcome sight on the highway today.
Whether in Hew England or California - Michigan or Florida, it is the guarantee to thousands of strangers that good accommodations can he had within.
90% of the motorists who tour use the Automobile Blue Books to guide them and look for this sign to direct them to the Official Blue Book stops.
Hang up the Blue Book Sign In front of your.place and it will bring you scores of desirable motor parties.
It is leased only to advertisers In the Automobile Blue Books.
Sign your name to the bottom of this letter and we will send you full details.
Very truly yours, ERM-MGH	Manager.
Signature of Prop, or Mgr
Automobile Blue Bookless??
2-1-3-24-9 -WEST 3 9T-JST.	NCT YORK	CITY
August 27th, 1917.
The Sign of Guaranteed Service