Blockade of Corfe Castle in 1644

In Martyn's Life of Shafetesbury (vol. i. p. 148.) it is stated that a parliamentary force, under Sir A.A. Cooper, blockaded Corfe Castle in 1644, after the taking of Wareham. I can find no mention any where else of an attack on Corfe Castle in 1644. The blockade of that castle, which Lady Bankes's defence has made memorable, was in the previous year, and Sir A.A. Cooper had not then joined the parliament. I should be glad if any of your readers could either corroborate Martyn's account of a blockade of Corfe Castle in 1644, or prove it to be, as I am inclined to think it, a mis-statement. I s…