The news of the arrival of the Royal Family in Lisbon is given in no. 156 of the Regency Daily, 4 July 1821, Wednesday edition:
NATIONAL NEWS.
Lisbon 3 July
Repeated Salutes from the Fortress, the Castle, and Warring Vessels, shall announce to the heroic inhabitants of this Capital the happy arrival of our Constitutional King. HRH entered in this port on board the D. João VI followed by other warring and trading ships: having all dropped anchor in front of the Royal Stables; immediately transporting on board the kingdom’s Deputation of the Regency…
Lisbon Municipal Newspaper Library
The news that makes reference to the Swearing of the Constitution by King João VI and consequent extinction of the Regency of the Kingdom came in the Supplement to no. 157 of the Regency Daily, 5 July 1821, Wednesday edition:
LISBON, 4 July.
Working Articles.
WARNING.
The General, Extraordinary and Constituent Courts of the Portuguese Nation hereby Declare and Decree that, Having the King ratified his oath to the Bases of the Political Constitution that the same Courts did make (…) and remain especially since the already extinct Regency of the Kingdom, created by Decree on the thirtieth of January of this present year.
Lisbon Municipal Newspaper Library