Actual incantation

Do we know for sure that this is an incantation, and that Tonks wasn't just packing everything non-verbally, with the text being emphasised for her saying "pack" more forcefully as she was casting the spell at the same time? --Hunnie Bunn (talk) 22:30, January 5, 2014 (UTC)

Worth mentioning that Tonks' mother can apparently perform this spell much better, to the extent that Andromeda can make socks fold themselves? Griffalo (talk) 02:51, January 10, 2016 (UTC)