Thank you for submitting your item for appraisal. These appear to be two chinese watercolours titled 行傭供母 and titled 孝感动天. These were taken from an album of 24 folktales on filial piety 孝感动天图册 possibly signed "Lin". Complete sets of similar quality have been sold at auction, but only two of a set is another story. The chinese art market is very volatile, therefor the estimate very tentative.