沙
=
少
+
氵
:
Sherlock Holmes (sh) is selling bottles (氵) in front of the ashram (a1). Smiley (少) comes round because thon is very thirsty and buys a bottle, just to find out that it contains only sand (沙).
漠
=
氵
+
莫
:
The desert (漠) is advancing into observatory's bathroom (o4), but Mozart (莫) and Mahatma Gandhi (m) are very unconcerned (漠) because they stockpiled a lot of water bottles (氵).
之
=
丶
+
Z
:
Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.