Theory:

     Then I would murmur, ‘’Thank you! Good morning, Mr Gessler.” “Good morning’” he would reply, still looking at the leather in his hand. And as I moved to the door, I would hear the tip-tap of his slippers going up the stairs: to his dream of boots.
 
     I cannot forget that day on which I had occasion to say to him, “Mr Gessler, that last pair of boots creaked, you know.”
 
     He looked at me for a time without replying, as if expecting me to withdraw or qualify the statement, then said,“ld shouldn’d’ave greaked.’’
 
     “It did, I’m afraid.”
 
     “You god dem wed before dey found demselves.”
 
     “I don’t think so.
 
     “At that he lowered his eyes, as if hunting for memory of those boots and I felt sorry I had mentioned this grave thing. “Zend dem back,” he said, “I will look at dem.”
 
     “Zome boods,” he continued slowly, “are bad from birdt. If I can do noding wid dem I take dem off your bill.”
Explanation:
 
The author would thank Mr. Gessler after ordering the boots, but the bootmaker would thank him back, starring at the leather in his hand. As the author would move towards the door, the tip-tap of the bootmaker's shoes could be heard indicating that he was returning to his job, his dream of boots.

The author also lets the reader know about a horrible experience he had one day in Gessler's shop, where he complained to the bootmaker about a pair of boots which creaked. The bootmaker was at a loss for words when it came to responding to the author because the bootmaker was more certain that his work would be of high quality.
 
For a long time, he stared at the author without replying anything, as if he expected the author to withdraw or clarify his statements. "It shouldn't have creaked," with more confidence in his job quality, the bootmaker replied to the author. Despite this, the author did not withdraw his complaint and continued to complain about the creaking boots. But, while repeating the complaint, the author was afraid.

The author had no intention of injuring the bootmaker, but he was afraid that his complaint would. The bootmaker then inquired the author if he had moistened the boots before allowing them to mould to the shape of his foot, to which the author replied that he hadn't. At that point, the bootmaker dropped his eyes, as if trying to recollect those boots, and the author felt bad for bringing up such a serious subject.

The bootmaker then explained to the author that some leathers used for boots were defective from the outset. As a result, he requested that the author bring those squeaked boots to be repaired. The bootmaker also guaranteed to refund the author's money if he could not fix the boots or were irreparably damaged.
 
Meaning of difficult words:
 
S.No
Words
Meaning
1.
Outset From the beginning
2.
CreakyWorn and broken by hard use
3.
Defective Imperfect or faulty
4.
IrreparableThat cannot be repaired
5.
QualifyModify
6.
Grave Bad or serious
Reference:
National Council of Educational Research and Training (2007). Honeycomb. Quality - John Galsworthy (pp. 71-78). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.