in which he notes that according to the law, learning Torah without a head-covering is permitted
Is it permissible to learn, pray and recite blessings bareheaded according to law or not? Since the statements by all the great adjudicators I have mentioned to you show that they considered it not necessary, with the exception of where the Name is mentioned, the case of study, according to them, seems obviously permissible according to the law.
Karnei RE'EM Responsa, paragraph 222, Samuel Elalouf Publishing, Salé (1910). Reprinted by Avishalom Avidor ben Adiv, Jerusalem, 2000.