Secret Service Investigators Ad, Denver, 1934
In this time period, private investigative services were often called
"Secret Service Investigators." Let's see what else we can
quickly find out about Leonard Delue and his Secret Service Investigators
from the ad. Note the logo. It's looks like a combination of the Masonic
Mason logo with a finger print in the middle. We checked and sure enough,
Leonard Delue was a Mason in 1934. However, further checking reveals
this logo to the the logo of the International
Association for Identification (IAI) which Leonard Delue was a member
of. The International Association for Identification was started in
the 1915 and was first called the International Association for Criminal
Identification. In 1918, at the fourth annual conference, the word "Criminal"
was dropped from the name of the Association, in recognition of the
volume of noncriminal work done by identification bureaus.
Note that Leonard Delue listed both his day office phone and night phone.
Note also the phone numbers. In 1934, there was only a two digit prefix.
KE-1397 would get the service during the day and FR-6348 would connect
you at night to what was Leonard Delue's home phone. We checked a 1934
phone book for Denver and sure enough, there was a Leonard Delue listed
at a home address (indicated with a "r" for residence) of
310 Colorado Blvd. with a phone number of FR-6348. Right below Leonard
Delue's residential listing was his business listing with the phone
number and address as above. There was also a notation after the listing
that states, " If no answer to above call MA-1718." Try and
get that kind of detailed listing from the phone company today! There
is no doubt that Leonard Delue took every step he could not not miss
any phone calls. The Gas And Electric Building still stands today in
downtown Denver. Below is a photo of the building.
postcard of the Gas And Electric Building. It was the "good"
business address to have in 1934.
Gas And Electric Building in downtown Denver as it stands today.
The building has been renovated.
Above is a Satellite image
of the Gas And Electric Building in downtown Denver.
Wouldn't Leonard Delue be highly impressed with that technology today.
The Ralph D. Thomas PI Vintage Collection
THOMAS INVESTIGATIE PUBLICATIONS, INC.
NATIONAL ASSOCIATION OF INVESTIGATIVE SPECIALISTS, INC.
SPY EXCHANGE AND SECURITY CENTER
P O Box 82148, Austin, Texas 78708
Showroom: 9513 Burnet Road, Austin, Texas 78758
Phone 512.719.3595 Fax 512.719.3594
To The Spy And PI Vintage Pages
2006, Thomas Investigative Publications, Inc. All rights reserved.
Thomas Investigative Publications, Trademark, 1981.
National Association Of Investigative Specialists, Inc, Trademark, 1986.
Spy Exchange, Trademark, 1999