     Finally, of course, just as it is possible to have any number of 
indexes over a given stored file, so it is equally possible to have any 
number of pointer chains running through a given stored file.  A common 
compression technique is thus to replace each individual data value by some 
representation of the difference between it and the value that immediately 
precedes it.  Another possible compression technique for this set of data 
is simply to eliminate all trailing blanks.  Further rear compression can 
be achieved by dropping all characters to the right of the one required to 
distinguish the entry in question from its two immediate neighbors.
     We were very pleased to receive your inquiry or January 15 and 
enclose our illustrated catalogue and print-list giving the details you ask 
for.  Also by separate post we are sending you a full range of samples and, 
when you have had an opportunity to examine them, feel confident you will 
agree that the goods are both excellent in quality and very reasonable in 
price.  We invite your attention to our other nylon products, details of 
which you will find in the catalog, and look forward to receiving your 
first order.
     Will you please send me a copy of your current typewriter catalog 
and pricelist?  I am particularly interested in portables, but require a 
machine suitable for fairly heavy duty including stencil-cutting.  Enclose 
the catalog of typewriters for which you ask in your letter of February 8.  
It includes particulars of portables by a number of makes.  We think the 
Olivetti "Studio 44" is a machine that would suit your purpose very well.  
This machine weighs 15 lbs. and is heavier than most portables, but even so 
it is conveniently portable when carried in its case.  A type-face suitable 
for stencil-cutting could be supplied.  We have one of these machines in 
stock and, if it is convenient for you to call, we shall be pleased to let 
you try it.
     The "China Post" has recommended your form as being interested in 
establishing business relations with a Chinese firm for the purpose of 
selling various products of your country and importing Chinese manufactured 
goods.  We specialize in central Europe trade, but we have had no contact 
wit your country.  We address this letter to you in order to ascertain 
whether cooperation to the advantage of both our firms could be 
established.  We invite you to send us details and prices, possibly also 
samples, of such goods as you would be principally interested in selling, 
and we shall gladly study the sales possibilities in our market.
     On the other hand, please favor us with a list of those articles you 
are interested in obtaining from here, so that we might be in a position 
to quote on same and give you all the necessary information regarding su-
pply possibilities.  We enclose herewith a list of goods for which we are 
representing the leading Chinese manufacturers for their exports or which 
we are now in a position to supply you from prime sources at the lowest 
possible prices.  This list consists of only a limited selection of the 
goods which our various departments are regularly supplying, but we are 
fully equipped to handle your needs for any merchandise whatsoever.
     Having already had experience in marketing products similar to your 
own we are familiar with customers' needs and are confident we could de-
velop a good market for you in Scotland, we have spacious and well-equipped 
showrooms, not only at our Glasgow headquarters, but also in Edinburgh and 
Perth, and an experienced staff of sales representatives who would push 
your business.  We should be glad to learn that you are interested in our 
proposal and on what terms you would be willing to conclude an agreement.  
Our Mr. Wormald would then call on you to discuss details, he will be 
visiting your town in two weeks' time.
     After studying the catalog and price list received with your letter 
of March 31, we have no doubt we could obtain good orders for many of the 
items, but feel you are placing both yourselves and us at a disadvantage by 
adopting a cash-settlement basis.  Nearly all business here is done on 
credit, the period varying from three to six months.  Your prices on the 
other hand are reasonable and your manufactures sound in both design and 
quality.  We therefore suggest that you could afford to raise your prices 
sufficiently to cover the cost and fall into line with your competitors in 
the matter of credit.  In our experience, to do so would be sound policy 
and greatly strengthen your hold on the market.  With the best will in the 
world to serve you, we are afraid it would be neither worth your while, nor 
ours, to continue business on a cash basis.
     Would you please estimate for installing central heating in the 
bungalow at I Margggate Road, St. Annes-on-Sea.  I enclose a specification 
and a plan showing required positions of radiators.  Cost is of course a 
matter of some importance but, as you will gather from the specification.  
I am interested only in first-class workmanship and in the use of best qua-
lity materials.  Completion of the work is required by August 31 at the la-
test, and I shall be glad if in your reply you will give me a firm comple-
tion date so that I can make arrangements for our removal from London.
     An estimated 25 other passengers on the British-chartered, Belgian-
registered bus were injured, some seriously, police said.  A police 
official in Neumarkt, 220 kilometers southwest of Vienna, said the bus 
sideswiped the tanker just north of Neumarkt, along a curving, rain-slicked 
stretch of highway in Austria's southern Alps.  The left front of the bus 
was torn off in the collision.  The tanker was damaged, but it was not 
clear if its driver was among the injured.