Further (OR) Farther

Both these are the comparative forms of ' Far '. Further means ' more, additional or more distance'. But ' Farther ' refers only to distance. Examples.

• We will make a decision on getting further details . ( NOT farther details.)
• It's a long walk from here , further than I thought. ( OR farther than....)
• I can't walk any farther. (OR any further)
• We must get further information. (NOT farther)
• We don't want to go further into the matter.(NOT farther)
• The examination stands postponed until further notice.(NOT farther notice)