It is believed that Abel was the man “Abel Yun-kwan-ming” who was also one of the Chinese language instructors for Robert Morrison 馬禮遜 (1782-1834).[12] Abel, an orphan from the Shanxi Province, was taken to Peking (Beijing) and brought up there by Catholic priests. He could speak fluent Guanhua 官話 (language of the officials) and Latin. He was as an active agent for priests in Canton and Macao afterwards, and he also taught English people the Chinese language. Morrison, on his first arrival, learned Chinese from Abel, but later stated that Yun was not very proficient in written Chinese.[13] However, what Carter said about Yun was different. In October 1805, Carter was commissioned by Carrington to prepare the Chinese translation of a document, making a complaint that American merchants had been unfairly treated,to be submitted to the Governor of Guangdong and Guangxi. Aware that his proficiency in Chinese was not up to the job, Carter sought help from Yun. The document was first translated into Latin by Carter, then into Chinese by Yun and finally signed jointly by American ship captains, supercargoes and merchants. Carter claimed that this was the first document in Chinese submitted by America to the Chinese government:

具禀花旗公司夷人等，因有紅毛戰船一只，船名吓唎口爺唲，屬吥哩口大呢呩囯王名下，今帶兵器來廣。對頭新到花旗船，船名喇唦嚟，船主名吔口哥咟口哥咟唲，保商昆水官。此花旗船是從啡嘞嘚嚊唖地方來廣貿易，今又要回啡嘞嘚嚊唖地方去。他如此利害，若不得我花旗船，決不放手，因此於本月十四日，花旗船主寫書與他，講如此風俗朋情全然不好，應當將所捉花旗船之人送回，到今亦未得回信。
即於本月十四日，紅毛戰船船主會同花旗一明白人，要下黃布（“浦”），查各花旗船，到如今亦未有同去。因此我等花旗船人，怕他搶花旗船上水手，到後來我等花旗夷人不能回本囯。我等船上所有貨物，俱是貴重之貨，必受大害，因此我等花旗夷人同心合意懇求　大人，我等各船亦肯相借水手相幫，將紅毛戰船捍逐出去，就是本朝廣東做生意各人，亦說紅毛戰船無理，說捍逐出去寔為妥當。於本月十六日，花旗船主又寄信一封與紅毛戰船船主，講如此利害對我花旗，即中囯各商人亦說是無道理，到如今亦不見回信。
我等花旗人來廣東做生意已經多年，俱是守分公平，全然不敢有犯本朝囯法，不敢乱一的規距（“矩”），俱是遵順本囯，因此生意一年多一年，與初時生意多數十倍。中囯人與我花旗，彼此大有利益。
他紅毛戰船終年終日以搶刧為生，各囯無不受其害。但今來廣，不獨與我花旗對頭，亦有相望此處之意。
我等花旗各船到廣貿易，相依　聖朝大國，又喜歡在大人賢明之下，心寔相安。因想紅毛戰船不言道理，不遵王法，怕一時受其害，是在大人治下，亦有不安。今我花旗等盡禀苦情，恭敬叩懇，務望　大人哀憐孤弱，公道救扶，大威一下，將紅毛戰船捍逐去海，併傳諭紅毛戰船，着他即將所捉花旗船上一人，送回花旗本船，使我等血本有歸，皆賴大人仁慈存憫，伏望縂督大人作主施行[14]

           Petition is hereby submitted by the foreigners of American companies for the issue related to a battleship of the red-haired foreigners (referring to the British). The ship, bringing arms with it to Canton, is known as H.M. Brig Harrier and belongs to the British King. The opponent party is a newly-arrived ship from the U.S. named as New Jersey. The captain is James Cooper and the security merchant in charge is Consequa. This American ship came from Philadelphia to Canton for trade, and will soon return to Philadelphia. The British are formidable and they will not stop bothering us Americans without getting our ships.  Therefore the captain of the American ship wrote a letter to them on the 14th of this month, telling them that such an act is harmful to the common practice, and that they should return the person who had been captured from the American ship. But so far there is no reply from them.
            On the 14th of this month, the captain of the British battleship, accompanied by a reasonable American, planned to sail down to Huangpu (Whampoa) to investigate all the American ships, but so far the American gentleman has not gone there with the British captain. Thus we people of the American ships are afraid that they will seize the sailors of the American ships and make us Americans unable to return to our country. All the commodities on our ship are valuable things and will no doubt be greatly damaged.  Therefore we Americans jointly entreat your Excellency to expel the British battleship. Our ships are also willing to send sailors to help with the task.  Even the local Guangdong merchants agree that the British battleship is making trouble groundlessly, and that it is really appropriate to expel the British battleship. On the 16th of this month, the captain of the American ship sent another letter to the captain of the British battleship telling them that their terribly unfair treatment of us Americans was also criticized as groundless by Chinese merchants.  But so far no reply is received.
            We Americans have been engaged in business in Guangdong for years. We all do our duties and are fair to everyone, refraining from breaking any law of the Heavenly Empire or any regulation in business. We all comply with the requirements of our country as well.  As a result, our business is growing year after year, and the volume of trade is now several dozen times more than the volume at the beginning. Both the Chinese and Americans stand to benefit from the trade.
            The British battleships make a living by committing robberies all the time, and none of the merchants from foreign countries can avoid suffering from them.  The aim of their recent arrival in Guangdong is not only to act against us Americans, but also to plot to seize more benefits in this province.
            Our American ships came to Guangdong for the development of trade and we can really put our mind at ease because we rely on the reign of the sagely empire and are overjoyed to be under the judicious rule of Your Excellency. Considering that the British with battleships are unreasonable and do not abide by law, we are afraid that damage may be caused to us in the  short term and are even more worried that the damage is caused under the rule of Your Excellency. We Americans hereby have informed Your Excellency of all our grievances, and respectfully request that Your Excellency commiserate with our disadvantage, and rectify the situation with impartiality by fully employing the power of Your Excellency to expel the British battleships back to the sea. Your Excellency is also requested to order the British battleship concerned to release the person, who was captured from the American ship by the British, and return him to his own American ship, and we can recover our capital. We all depend on Your Excellency for beneficence and help. We humbly entreat Your Excellency to make a decision and carry it out.[15]