Sentence:  [H]e went home ... and told them about his trip; how at Ripon he saw the gassiest man he had ever seen; an old steamboat captain by the name of Mapes; how I told him where we were going to have colleges, mills, stores, etc., ... the last time I saw him before he died he told me that he had seen all my <WSD>gassy</WSD> story carried out, and more too. 
Meaning of the word marked with <WSD> tags:  Tending to be long-winded or wordy, especially in a boastful and vain manner.