I need to establish links to URLs that include the ampersand (&) and number
sign (#).

e.g.,

http://www.mhs.ox.ac.uk/collections/imu-search-page/record-details/?TitInventoryNo=40829&querytype=field&thumbnails=on&irn=2020

and

http://www.davidaking.org/instrument-catalogue-TOC.htm#part6

How does one do this? The best I have done thus far is to get broken links
that display as they should.

Alan