"Don" might indeed still mean an enclosed strong place, and the meaning of the whole word "London" would then be Llandun, or "the level ground near the fort or strong camp." Perhaps some of your correspondents may be able to offer something confirmatory or adverse to this explanation, and in either case I should join with the rest of your readers in thanking them.
M. C. E.
Verses on Shipmoney.—
"A coppy of certaine Verses dispersed in and about London in febr. 1634 in ye 10th year of ye Raigne of ye King Charls occasioned by ye eager prosecucon of Shipmoney, and Imprisonmts therefore.
"The Cittie Cofers abounding with Treasure,
Can pay this ship Tribute, and doe poor men pleasure
To save that Pelfe: the more is the pitty,
The Grey Cloaks divide it and yet tax the Citty.
A p'sent there being small occasion for Gold
Hast thether Collectors, 'tis time it were tould