Archibald Douglas is the only one who seems to fit in Grimwade. I've never heard of him before though.
A toilet jar is a generic term for any jar used in dressing, make-up, hair etc all of which used to be called "making one's toilet". You'll find this phrase in 19th century literature.
Oliver Twist
Oliver was not long in making his toilet having taken some
breakfast, he replied to a surly inquiry from Sikes, by saying
that he was quite ready.
I'd just call it a jar.
Miles
.