After a few days at home trying the various methods, locations, and positions that Henry likes to spend his time prior to falling asleep (as these would sometimes change with alarming regularity) , we glanced into the corner of the flat that contains a small mountain of items on loan from various friends who have previously ventured into this life of parenting, and spotted "the rocker".
Mim and Phil, we thank you for this. Although only Henry fits within, it has provided all three of us with many hours of sleep.