John Ruskin letter to Ellen Heaton, 1855 May 19?

Ruskin is writing from his bed. He advises Heaton to acquire a Turner, remarking that Turner's Parnassus and Castle St Angelo is better than his Berne, with the Parnassus the "finest." Ruskin advises Heaton to protect the Parnassus from light. He suggests she commissions work from both John William Inchbold and Arthur Hughes. He admits he has not been able to get Heaton's daguerreotypes but suggests places where she might be able to source duplicates or alternatives. Ruskin admits that he is "quite laid up" and enquires after Thomas Richmond's health. In a postscript, Ruskin praises Hughes's use of colour and compliments Heaton's perception of colour. [Date provided by Surtees: 19? May 1855]