Messrs. William & Sons
58 Lancastor House
March 20, 1999
Our ref. No.
Your ref. No.
The National Transport Co.
120 Broadway Street
Re: Lab Instruments
Your firm has been recommended to us by Messrs. Charles Evans Ltd., Birmingham, with whom we have done some business for the past two years.
We are thinking of getting a supply of instruments. Please furnish us with a catalogue, price list and brochure, if available.
We are looking forward to your early reply.
EL Mar Trading Company
16 Main Street
Cable Address: ELMAR FRESNO
We thank you for your letter of January 1. As requested, we enclose the catalogues for your reference.
We would be very glad to offer any further assistance. Please contact us if you need any additional information.
Encl. : as stated
（三）混合式 ( Semiblock style with indented paragraphs)
Office of the Attorney
123 Main Street
U. S. A.
April 21, 1999
President, Billboard Inc.
We value your long-term relationship with us.
A review of your account shows that some time has passed since you last made payment to us. If there is some difficulty you are facing that is causing this, we would like the opportunity of working matters out with you. If there is the result of oversight, we would appreciate early remittance.
We look forward to hearing from you in the near future.