Disquisition

Near-synonym: inquisition

Source: wiktionary

Upon the subject of leases, as I wish to avoid all disquisitions which concern the kingdom at large, as much as the county of Lincoln in particular, it will be necessary only to remark, that great as have been improvements in it, I have not the least doubt they would have been much greater and more rapid, had the custom of granting leases been as common here as it is in Norfolk or Suffolk.

Source: wiktionary

..."What a feeling of security," continued he, "is flung round the uncertainty of love, by the calm and gentle images with which it is here invested!—" But their disquisition was interrupted by Lord Avonleigh, who came to announce that a deputation from Southampton waited without, full of eloquence and loyalty.

Source: wiktionary

The usual accusation against [Robert] Browning is that he was consumed with logic; that he thought all subjects to be the proper pabulum of intellectual disquisition; […]

Source: wiktionary