what does the narrator tell about the history of the lovely town of Marlow ?

From the text:

Marlow is one of the pleasantest river centres I know of. It is a bustling, lively little town; not very picturesque on the whole, it is true, but there are many quaint nooks and corners to be found in it, nevertheless—standing arches in the shattered bridge of Time, over which our fancy travels back to the days when Marlow Manor owned Saxon Algar for its lord, ere conquering William seized it to give to Queen Matilda, ere it passed to the Earls of Warwick or to worldly-wise Lord Paget, the councillor of four successive sovereigns. There is lovely country round about it, too, if, after boating, you are fond of a walk, while the river itself is at its best here.