During his entire stay in Prague, especially in the 1840s, his very existence depended on the 380 guldens he received annually from his Czech friends under the condition which explicitly expressed František Palacký: "From now on, anything you write, you will write it in the Czech language only."
Počas celého svojho pobytu v Prahe, najmä v 40-tych rokoch, závisela celá jeho existencia na 380 zlatých, ktoré ročne dostával od svojich českých priateľov pod podmienkou, že – ako to František Palacký explicitne formuloval – "od teraz, čokoľvek budete písať, budete to písať len v českom jazyku".