Actually, I do not add commentary unless there is something useful to say - in which case it is added as an clear annotation listing source etc.
Generally the questions I ask here are for my own amusement, as spending ten or more hours a day digitising can be a bit mind numbing... on the plus side it concentrates the mind on the subject matter in isolation from other thoughts and thus numerous anomalies pop-up.
I am not sure how S&W organised their pattern numbers, did they reserve ranges for certain types of object, or by department, did services and individual items differ? The highest numbers in this catalogue are in the range 381xx but unfortunately only the price lists gives the varieties of a model. Pattern numbers did differ, in some cases, for an item and these can be widely different or consecutive, only one example illustrated for example:
Jug 28023½

is for Plain or Venetian Waved, and 28023 was the same but with Star bottom.
But Richly Cut Jug 36521

was also available Plain or Venetian Waved as number 23660 - a huge difference.
Although some of the pattern numbers in this catalogue are clearly nineteenth century. (Corning contact advised me: I looked at the description books from S&W, which we borrowed from S&W, and microfilmed. The highest ware number in the catalog is 19718, which appears in Description Book #17, which dates to about 1893.) Obviously I will follow-up further with Corning once the digitisation is completed to get a better dating. The 'Description Books' no doubt hold the an answer to how numbers were allocated.
Another limitation of the catalogue is that each of these jugs was available in 6 sizes from ½pint to 2 quart and the price ratio between plain and decorated was highly variable. It would probably be obvious why if photographs of each size were available. Like this one

31591 Intagloid "Water Lily": ½pint 4s. 2 Quart 17/6d. As Plain or Waved : ½pint 2s. 2 Quart 6.